- "Chapter 3: Prostitution" from Studies in the Psychology of Sex
- On the Causes of Prostitution from Studies in the Psychology of Sex, Volume 6
- Sexual inversion
- "Sexual Inversion in Men" From Sexual Inversion (1901)
- "Sexual Inversion in Women" from Sexual Inversion (1901)
- The Study of Sexual Inversion (From Studies in the Psychology of Sex)