Hello IssacBirnbaum! Welcome to Wikipedia! Thank you for your contributions. If you decide that you need help, check out Getting Help below, ask me on my talk page, or place {{helpme}} on your talk page and someone will show up shortly to answer your questions. Please remember to sign your name on talk pages by clicking or using four tildes (~~~~); this will automatically produce your name and the date. Finally, please do your best to always fill in the edit summary field. Below are some useful links to facilitate your involvement. Happy editing! FDW777 (talk) 10:41, 1 December 2019 (UTC)[reply]
I am afraid I have had to revert this change. The referenced cited is in violation of an Arbitration Committee ruling, specifically Wikipedia:Arbitration/Requests/Case/Antisemitism in Poland#Article sourcing expectations which states "The sourcing expectations applied to the article Collaboration in German-occupied Poland are expanded and adapted to cover all articles on the topic of Polish history during World War II (1933-45), including the Holocaust in Poland. Only high quality sources may be used, specifically peer-reviewed scholarly journals, academically focused books by reputable publishers, and/or articles published by reputable institutions. English-language sources are preferred over non-English ones when available and of equal quality and relevance. Editors repeatedly failing to meet this standard may be topic-banned as an arbitration enforcement action." That means websites such as www.holocaustresearchproject.org are unacceptable sorry, even though it was already used in the article. FDW777 (talk) 10:41, 1 December 2019 (UTC)[reply]
