APA aipamena

KOHLER Richard. (2014). Jean Piaget. Bloomsbury Acaqdemic.

Chicago Style aipamena

KOHLER Richard. Jean Piaget. Bloomsbury Acaqdemic, 2014.

MLA aipamena

KOHLER Richard. Jean Piaget. Bloomsbury Acaqdemic, 2014.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.