Witters, W. L., & Jones-Witters, P. (1980). Human sexuality: A biological perspective. D. Van Notstrand.
Lua i Stíl Chicago (17ú heag.)Witters, Weldon L., agus Patricia Jones-Witters. Human Sexuality: A Biological Perspective. New York: D. Van Notstrand, 1980.
Lua MLA (9ú heag.)Witters, Weldon L., agus Patricia Jones-Witters. Human Sexuality: A Biological Perspective. D. Van Notstrand, 1980.
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