APA (7th ed.) Citation

Ulrichs, K. H. (1994). The riddle of "man-manly love": The pioneering work on male homosexuality. Prometheus Books.

Chicago Style (17th ed.) Citation

Ulrichs, Karl Heinrich. The Riddle of "Man-manly Love": The Pioneering Work on Male Homosexuality. Buffalo: Prometheus Books, 1994.

MLA (9th ed.) Citation

Ulrichs, Karl Heinrich. The Riddle of "Man-manly Love": The Pioneering Work on Male Homosexuality. Prometheus Books, 1994.