Lua APA (7ú heag.)
Boyd, R., & Richerson, P. J. (2005). The origin and evolution of cultures. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)
Boyd, Robert, agus Peter J. Richerson. The Origin and Evolution of Cultures. Oxford ; New York: Oxford University Press, 2005.
Lua MLA (9ú heag.)
Boyd, Robert, agus Peter J. Richerson. The Origin and Evolution of Cultures. Oxford University Press, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.