Citazione Stile APA (7a Edizione)

Cornwell, R. D. (1993). World history in the twentieth century (New ed. 1980, 12th impr.). Longman.

Citazione stile Chigago Style (17a edizione)

Cornwell, Roger Derek. World History in the Twentieth Century. New ed. 1980, 12th impr. London: Longman, 1993.

Citatione MLA (9a ed.)

Cornwell, Roger Derek. World History in the Twentieth Century. New ed. 1980, 12th impr. Longman, 1993.