Citazione Stile APA (7a Edizione)

Mills, H. (1992). Twentieth century world history in focus. Nelson.

Citazione stile Chigago Style (17a edizione)

Mills, Harry. Twentieth Century World History in Focus. Walton-on-Thames: Nelson, 1992.

Citatione MLA (9a ed.)

Mills, Harry. Twentieth Century World History in Focus. Nelson, 1992.