Citazione Stile APA (7a Edizione)

Richards, D. (1980). An illustrated history of modern Europe 1789 - 1974 (6. ed., 4. impression.). Longman.

Citazione stile Chigago Style (17a edizione)

Richards, Denis. An Illustrated History of Modern Europe 1789 - 1974. 6. ed., 4. impression. London: Longman, 1980.

Citatione MLA (9a ed.)

Richards, Denis. An Illustrated History of Modern Europe 1789 - 1974. 6. ed., 4. impression. Longman, 1980.