Cita APA (7th ed.)
Greer, T. H. (1992). A brief history of the Western world (6th.ed.). HBJ.
Cita Chicago (17th ed.)
Greer, Thomas H. A Brief History of the Western World. 6th.ed. New York: HBJ, 1992.
Cita MLA (9th ed.)
Greer, Thomas H. A Brief History of the Western World. 6th.ed. HBJ, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.