APA (7th ed.) Zitazioa
Silverberg, R. Mound builders of ancient America: The archaeology of a myth.
Chicago Style (17th ed.) Zitazioa
Silverberg, Robert. Mound Builders of Ancient America: The Archaeology of a Myth.
MLA (9th ed.) Zitazioa
Silverberg, Robert. Mound Builders of Ancient America: The Archaeology of a Myth.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.