Howells, W. (1967). Mankind in the making: The story of human evolution (Rev. ed.). Doubleday.
Čikaški stil citiranja (17. izdanje)Howells, William. Mankind in the Making: The Story of Human Evolution. Rev. ed. Garden City, N.Y: Doubleday, 1967.
MLA način citiranja (9. izdanje)Howells, William. Mankind in the Making: The Story of Human Evolution. Rev. ed. Doubleday, 1967.
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