APA (7th ed.) Zitazioa
Greer, T. H. (1992). A brief history of the Western world (6th.ed.). HBJ.
Chicago Style (17th ed.) Zitazioa
Greer, Thomas H. A Brief History of the Western World. 6th.ed. New York: HBJ, 1992.
MLA (9th ed.) Zitazioa
Greer, Thomas H. A Brief History of the Western World. 6th.ed. HBJ, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.