Cita APA (7a ed.)

Underwood, S. G. (2003). Gay men and anal eroticism: Tops, bottoms, and versatiles. Harrington Park Press.

Cita Chicago Style (17a ed.)

Underwood, Steven G. Gay Men and Anal Eroticism: Tops, Bottoms, and Versatiles. New York: Harrington Park Press, 2003.

Cita MLA (9a ed.)

Underwood, Steven G. Gay Men and Anal Eroticism: Tops, Bottoms, and Versatiles. Harrington Park Press, 2003.