Dunbar, R. (2010). Why only humans have language. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Dunbar, R. Why Only Humans Have Language. Oxford University Press, 2010.
Lua MLA (9ú heag.)Dunbar, R. Why Only Humans Have Language. Oxford University Press, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.