Dyfyniad APA

Hess, K. L., Reynolds, G. L., & Fisher, D. G. (2013). Heterosexual Anal Intercourse among Men in Long Beach, California.

Dyfyniad Arddull Chicago

Hess, Kristen L., Grace L. Reynolds, and Dennis G. Fisher. Heterosexual Anal Intercourse Among Men in Long Beach, California. 2013.

Dyfyniad MLA

Hess, Kristen L., Grace L. Reynolds, and Dennis G. Fisher. Heterosexual Anal Intercourse Among Men in Long Beach, California. 2013.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.