Aharit Hayamim
http://www.aharithayamim.co.il/rabbis-that-converted-to-christianity/rabbi-leopold-cohn/
http://www.aharithayamim.co.il
International Mission to Jewish People (Australia)
https://www.cwi.org.au/index.php?id=36&uid=94
Jews for Jesus
https://jewsforjesus.org/publications/issues/issues-v05-n01/what-one-rabbi-discovered/
Jewish Roots
https://jewishroots.net/library/testimonials/rabbi_leopold_cohn_testimony.html
Jewish Testimonies
https://www.jewishtestimonies.com/en/leopold-cohn-the-quest-of-a-young-rabbi/
https://www.jewishtestimonies.com
Messianic Good News
http://www.messianicgoodnews.org/rabbi-leopold-cohn-d-d-1862-1937/
http://www.messianicgoodnews.org
Real Messiah
http://realmessiah.com/index.php/en/testimonies
Shalom
http://www.shalom.org.uk/library/RabbisWhoBelieved/RabbiLeopoldCohn.html
Who Has Believed
https://whohasbelieved.net/testimonies/leopold-hoffman-cohn/
Wikipedia
https://en.wikipedia.org/wiki/Leopold_Cohn_(Christian_clergyman)