APA (7th ed.) Zitazioa

Richardson, K. (1998). Models of cognitive development. Psychology Press.

Chicago Style (17th ed.) Zitazioa

Richardson, Ken. Models of Cognitive Development. Hove, East Sussex, UK: Psychology Press, 1998.

MLA (9th ed.) Zitazioa

Richardson, Ken. Models of Cognitive Development. Psychology Press, 1998.