Ash, P., & Robinson, D. (2010). The emergence of humans: An exploration of the evolutionary timeline. Wiley-Blackwell.
Lua i Stíl Chicago (17ú heag.)Ash, Patricia, agus David Robinson. The Emergence of Humans: An Exploration of the Evolutionary Timeline. West Sussex, [England]: Wiley-Blackwell, 2010.
Lua MLA (9ú heag.)Ash, Patricia, agus David Robinson. The Emergence of Humans: An Exploration of the Evolutionary Timeline. Wiley-Blackwell, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.