APA (7th ed.) Zitazioa
Paddock, J. Early steps in the evolution of maya writing.
Chicago Style (17th ed.) Zitazioa
Paddock, John. Early Steps in the Evolution of Maya Writing.
MLA (9th ed.) Zitazioa
Paddock, John. Early Steps in the Evolution of Maya Writing.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.