APA (7th ed.) Zitazioa
Ekholm-Miller, S. (1973). The Olmec rock carving at Xoc, Chiapas, Mexico. New World Archaeological Foundation.
Chicago Style (17th ed.) Zitazioa
Ekholm-Miller, Susanna. The Olmec Rock Carving at Xoc, Chiapas, Mexico. Provo, Utah: New World Archaeological Foundation, 1973.
MLA (9th ed.) Zitazioa
Ekholm-Miller, Susanna. The Olmec Rock Carving at Xoc, Chiapas, Mexico. New World Archaeological Foundation, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.