In the {{in source}} link, it shows the text surrounding the source, so you could scan the article manually and look for the text.
You could also go to the "References" section of the page and find the source there.
You could also paste the entire page into Google Docs or any other application that lets you search for specific words and then proceed to search for the source that way.
Remove the source, making sure to additionally remove the text that is being sourced by said source. Alternatively, you can replace the reference with a {{citation needed}} tag. You can find examples of this here,here and here.
Save the edit with an edit summary of "Unreliable source".
Use the template below to add to any of the sections except for#WP:CHARTS#Websites to avoid, unless a new website is included there. If you need to start a new section, do so.
* {{in source|"example.com/example"|example.com/example}} – (description of why this source is unreliable.)
americatop100.com – Sourcing for these charts is indeterminate. (March 1, 2021)
charly1300.com – Reproduces some data available from Recommended charts. Other available chart information is of unsystematic or uncertain origin. (March 1, 2021)
chartblue.com – Indeterminate methodology. (no pages when this list was started)
chartdata.org – Reproduces some data available from Recommended charts. Other available chart information is of unsystematic or uncertain origin. (March 1, 2021)
chartmasters.org – Falls under WP:SPS, and there's no indication of where the figures are from. (March 3, 2021)
hitparadeitalia.it – Hobbyist web site, uses various sources to recreate, through his own methodology, fictional national charts.Warning: this website is used in around 500 articles.
kworb.net – Mostly compiles airplay data from Mediabase along with normalized popularity values for tracks in the iTunes Store; in particular, the sales estimates page should not be cited under any circumstance, as the provided figures on the page are merely estimated and are not based on official data. (March 2, 2021)
madonna-charts.com – Fan site, indeterminate methodology. (March 3, 2021)
mariah-charts.com – Fan site, indeterminate methodology. (March 3, 2021)
slokylie.com – Fan site, indeterminate methodology. (March 3, 2021)
top40-charts.com – Unclear methodology, unknown sourcing.Warning: this website is used in around 1000 articles.
tsort.info/music – In general, reproduces information available directly from sources listed in Recommended charts. Exceptions appear to be sourced from single-station airplay or single-vendor sales figures. Warning: this website is used in around 1000 articles.
twitter.com/chartnews – In general, reproduces information available directly from sources listed in Recommended charts. Sales figures appear to be obtained from a mixture of reliable and unreliable sources, including mediatraffic.de; in some cases, provided sales figures do not match those from recommended sources provided concurrently. (March 1, 2021)
uk-charts.top-source.info – Hobbyist web site, indeterminate sourcing and methodology. Warning: this website is used in around 750 articles.
ukchartsplus.co.uk – In general, reproduces information available directly from sources listed in Recommended charts. Uncertain methodology as to annual figures, which do not match recommended sources. Warning: this website is used in around 2000 articles.
worldmusicawards.com – Although this is an actual (sometimes) televised awards show (with an admittedly shaky history), the articles found under the "News" section of its official website should not be cited, as the text of these articles is copied verbatim from mediatraffic.de, including the dubious sales data. (March 4, 2021)
twitter.com/chartdata – Unverified Twitter account that violates WP:SOCIALMEDIA points two (it does not involve claims about third parties), three (it does not involve claims about events not directly related to the source) and four (there is no reasonable doubt as to its authenticity). (February 27, 2021)
twitter.com/coldplayxtra – Unverified Twitter account that violates WP:SOCIALMEDIA points two (it does not involve claims about third parties), three (it does not involve claims about events not directly related to the source) and four (there is no reasonable doubt as to its authenticity). (August 16, 2021)
twitter.com/MariaBcharts – Unverified Twitter account that violates WP:SOCIALMEDIA points two (it does not involve claims about third parties), three (it does not involve claims about events not directly related to the source) and four (there is no reasonable doubt as to its authenticity). (May 12, 2021)
twitter.com/popcrave – Unverified Twitter account that violates WP:SOCIALMEDIA points two (it does not involve claims about third parties), three (it does not involve claims about events not directly related to the source) and four (there is no reasonable doubt as to its authenticity). (February 28, 2021)
twitter.com/talkofthecharts – Unverified Twitter account that violates WP:SOCIALMEDIA points two (it does not involve claims about third parties) and four (there is no reasonable doubt as to its authenticity). (April 11, 2021)
twitter.com/tswiftnz – Unverified Twitter account that violates WP:SOCIALMEDIA points two (it does not involve claims about third parties), three (it does not involve claims about events not directly related to the source) and four (there is no reasonable doubt as to its authenticity). (July 18, 2021)
