APA (7th ed.) Zitazioa
Hitchcock, R. (2001). The Louisiana purchase. Digital Scanning.
Chicago Style (17th ed.) Zitazioa
Hitchcock, Ripley. The Louisiana Purchase. Scituate, Mass.: Digital Scanning, 2001.
MLA (9th ed.) Zitazioa
Hitchcock, Ripley. The Louisiana Purchase. Digital Scanning, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.