Delisle, Françoise (1946). Friendship's Odyssey. The Autobiography of Françoise Delisle and the Story of Havelock Ellis from 1916 to 1939. London: William Heinemann Ltd. ASINB003A10PT2.
Crozier 2008. Crozier, Ivan (2008). "Havelock Ellis, eugenicist". Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences. 39 (2): 187–94. doi:10.1016/j.shpsc.2008.03.002. ISSN1369-8486. PMID18534349.
Crozier 2008. Crozier, Ivan (2008). "Havelock Ellis, eugenicist". Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences. 39 (2): 187–94. doi:10.1016/j.shpsc.2008.03.002. ISSN1369-8486. PMID18534349.
Crozier 2008. Crozier, Ivan (2008). "Havelock Ellis, eugenicist". Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences. 39 (2): 187–94. doi:10.1016/j.shpsc.2008.03.002. ISSN1369-8486. PMID18534349.