The New York State Census of 1905", 16th Assembly District, Borough of Brooklyn, Kings County, State of New York, June 1, 1905. Digital copy of original 1905 enumeration page available on FamilySearch, an online genealogical database provided as a public service by The Church of Jesus Christ of Latter-day Saints, Salt Lake City, Utah. Посетен на 21 юли 2017 г.
LoBianco, Lorraine. "Thelma Ritter Profile", Turner Classic Movies (Turner Classic Movie), a Time Warner Company, New York, N.Y. Посетен на 21 юли 2017 г.