1. Cassedy , “Frederick Ludwig Hoffman,” 385.
2. Prudential Home News, November, 1919
3. The Problem of Negro-White Intermixture and Intermarriage;Hoffman;Eugenics in Race and State,1923
4. Rigney , “Frederick L. Hoffman,” 125–26
5. Stone , “The Struggle for the Soul of Health Insurance,” 299.