Citazione Stile APA (7a Edizione)
Pepperberg, I. M. (1999). The Alex studies: Cognitive and communicative abilities of grey parrots. Harvard University Press.
Citazione stile Chigago Style (17a edizione)
Pepperberg, Irene M. The Alex Studies: Cognitive and Communicative Abilities of Grey Parrots. Cambridge, MA: Harvard University Press, 1999.
Citatione MLA (9a ed.)
Pepperberg, Irene M. The Alex Studies: Cognitive and Communicative Abilities of Grey Parrots. Harvard University Press, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.