Williams, G. C. (1992). Natural selection: Domains, levels, and challenges. Oxford university press.
Lua i Stíl Chicago (17ú heag.)Williams, George C. Natural Selection: Domains, Levels, and Challenges. New York: Oxford university press, 1992.
Lua MLA (9ú heag.)Williams, George C. Natural Selection: Domains, Levels, and Challenges. Oxford university press, 1992.
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