Regal, B. (2004). Human evolution: A guide to the debates. ABC-CLIO.
Lua i Stíl Chicago (17ú heag.)Regal, Brian. Human Evolution: A Guide to the Debates. Santa Barbara, Calif: ABC-CLIO, 2004.
Lua MLA (9ú heag.)Regal, Brian. Human Evolution: A Guide to the Debates. ABC-CLIO, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.