Citazione Stile APA (7a Edizione)

Edgar, R. R. (2008). Civilizations past & present (12th ed., combined vol.). Pearson/Longman.

Citazione stile Chigago Style (17a edizione)

Edgar, Robert R. Civilizations Past & Present. 12th ed., combined vol. New York [u.a.]: Pearson/Longman, 2008.

Citatione MLA (9a ed.)

Edgar, Robert R. Civilizations Past & Present. 12th ed., combined vol. Pearson/Longman, 2008.