APA (7th ed.) Citation

Ellis, H., & Ellis, H. (1940). Sexo-aesthetic inversion: By Havelock Ellis. [Random ?].

Chicago Style (17th ed.) Citation

Ellis, Havelock, and Havelock Ellis. Sexo-aesthetic Inversion: By Havelock Ellis. [New York ?]: [Random ?], 1940.

MLA (8th ed.) Citation

Ellis, Havelock, and Havelock Ellis. Sexo-aesthetic Inversion: By Havelock Ellis. [Random ?], 1940.

Warning: These citations may not always be 100% accurate.