Reliable publications include established newspapers, academic journals and books, textbooks, and other published sources with reputations for accuracy and fact-checking.
Unreliable sources include blog posts and other self-published works, press releases, and social media posts.
In order for a source to be considered verifiable, other editors should be able to consult the source.
Is the source independent of the subject?
Is the source connected in any way to the subject? This is especially important when writing biographies or about organizations.
For example, if you were writing a biography, sources like the person's webpage or personal blog would not be considered independent.
Is the source primary or secondary?
Primary sources include first-hand accounts, autobiographies, and other original content.
Wikipedia allows limited use of primary sources, but typically only for straightforward, descriptive statements of facts, and only if they are published and verifiable without requiring specialized knowledge.
Secondary sources should be the main basis for a biography on Wikipedia.
If you're working on a topic related to medicine or psychology, ensure that your sources follow these special guidelines.
If you're creating a new article, consider the following:
Ensure that your topic meets Wikipedia's notability guidelines.
In order for a topic to meet the notability requirement, you must be able to identify 2-3 sources that are reliable, verifiable, and independent of the subject you're writing about.
Finding sufficient sources to establish notability can be especially hard when writing about people or organizations.
Sources that are not independent of the subject might be useful additions, but don't count towards the notability requirement.
Wikipedia has developed special guidelines for writing about living persons. Please follow these carefully.
Wikipedia has a series of guidelines for writing about different categories of people, such as academics and artists. If you're trying to create a new entry about a living person, please look at these carefully.
If you're not sure whether a source is reliable, ask a librarian! If you have questions about Wikipedia's sourcing rules, you can use the Get Help button below to contact your Wikipedia Expert.
Heister, S. D., Anderson, W. E., Pourpoint, T. L., Cassady, J., & Cassady, R. J. (2019). Rocket propulsion (Vol. 47). Cambridge University Press.[1]
This is a book published by a university press, so it is reliable. It goes into great detail on how liquid propelled rocket engines work, among other types of rocket engines. It will be helpful for filling in any content gaps in the article, as well as comparing and contrasting liquid propelled rockets with other types of propulsion.
Turner, M. J. (2008). Rocket and spacecraft propulsion: principles, practice and new developments. Springer Science & Business Media.[2]
This is a Spring published book, so it is likely reliable. It gives a higher level overview of rocket propulsion systems, and describes the components of a liquid propellant rocket engine. It will be helpful in giving insights into why liquid propelled rocket engines are so widely used in the industry today.
Examples:
Luke, Learie. 2007. Identity and secession in the Caribbean: Tobago versus Trinidad, 1889–1980 Kingston, Jamaica: University of the West Indies Press.
This is a book published by a university press, so it should be a reliable source. It also covers the topic in some depth, so it's helpful in establishing notability.
Galeano, Gloria; Bernal, Rodrigo (2013-11-08). "Sabinaria , a new genus of palms (Cryosophileae, Coryphoideae, Arecaceae) from the Colombia-Panama border". Phytotaxa.
This is a peer-reviewed scientific journal, so it should be a reliable source. It covers the topic in some depth, so it's helpful in establishing notability.
Baker, William J.; Dransfield, John (2016). "Beyond Genera Palmarum: progress and prospects in palm systematics". Botanical Journal of the Linnean Society.
This is a peer-reviewed scientific journal, so it should be a reliable source for a specific fact. Since it only dedicates a few sentences to the topic, it can't be used to establish notability.
^Heister, Stephen D.; Anderson, William E.; Pourpoint, Timothée L.; Cassady, R. Joseph (2019-02-07). Rocket Propulsion. Cambridge University Press. ISBN978-1-108-38137-6.
Currently, the Wikipedia article on Liquid Propelled Rockets does not describe any of the advantages that liquid propulsion provides. I believe that this is a key detail about the technology, as the use of liquid propellants is one of the main reasons why rockets are able to deliver things into orbit with such precision. I plan on adding a section that describes the utility of liquid propulsion systems.
Now that you have compiled a bibliography, it's time to plan out how you'll improve your assigned article.
In this section, write up a concise outline of how the sources you've identified will add relevant information to your chosen article. Be sure to discuss what content gap your additions tackle and how these additions will improve the article's quality.
Consider other changes you'll make to the article, including possible deletions of irrelevant, outdated, or incorrect information, restructuring of the article to improve its readability or any other change you plan on making. This is your chance to really think about how your proposed additions will improve your chosen article and to vet your sources even further.
Note: This is not a draft. This is an outline/plan where you can think about how the sources you've identified will fill in a content gap.
