APA aipamena

Firth, R. (1958). Human types. New York: A Mentor Book.

Chicago Style aipamena

Firth, Raymond. Human Types. New York: A Mentor Book, 1958.

MLA aipamena

Firth, Raymond. Human Types. New York: A Mentor Book, 1958.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.