Gibson, K. R., & Parker, S. T. (1990). "Language" and intelligence in monkeys and apes: Comparative developmental perspectives. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Gibson, Kathleen Rita, agus Sue Taylor Parker. "Language" and Intelligence in Monkeys and Apes: Comparative Developmental Perspectives. Cambridge [England]: Cambridge University Press, 1990.
Lua MLA (9ú heag.)Gibson, Kathleen Rita, agus Sue Taylor Parker. "Language" and Intelligence in Monkeys and Apes: Comparative Developmental Perspectives. Cambridge University Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.