APA (7th ed.) Zitazioa
Morris, C. (1946). Signs, language and behaviour. George Braziller.
Chicago Style (17th ed.) Zitazioa
Morris, Charles. Signs, Language and Behaviour. New York: George Braziller, 1946.
MLA (9th ed.) Zitazioa
Morris, Charles. Signs, Language and Behaviour. George Braziller, 1946.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.