APA (7th ed.) Zitazioa
Smithsonian Institution & Scarre, C. (1993). Smithsonian timelines of the ancient world (1st American ed.). D. Kindersley.
Chicago Style (17th ed.) Zitazioa
Smithsonian Institution eta Christopher Scarre. Smithsonian Timelines of the Ancient World. 1st American ed. New York: D. Kindersley, 1993.
MLA (9th ed.) Zitazioa
Smithsonian Institution eta Christopher Scarre. Smithsonian Timelines of the Ancient World. 1st American ed. D. Kindersley, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.