Darwin Charles. (1979). The descent of man: And selection in relation to sex. The Easton Press.
Lua i Stíl Chicago (17ú heag.)Darwin Charles. The Descent of Man: And Selection in Relation to Sex. Norwalk: The Easton Press, 1979.
Lua MLA (9ú heag.)Darwin Charles. The Descent of Man: And Selection in Relation to Sex. The Easton Press, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.