APA (7th ed.) Citation

Forel, A., & Marshall, C. F. (2009). The Sexual Question A Scientific, psychological, hygienic and sociological study. Project Gutenberg.

Chicago Style (17th ed.) Citation

Forel, Auguste, and C. F. Marshall. The Sexual Question A Scientific, Psychological, Hygienic and Sociological Study. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Forel, Auguste, and C. F. Marshall. The Sexual Question A Scientific, Psychological, Hygienic and Sociological Study. Project Gutenberg, 2009.

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