Citazione Stile APA (7a Edizione)

Kohn, C. F., & Drummond, D. W. (1968). The world today: Its patterns and cultures (2. ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Kohn, Clyde F., e Dorothy Weitz Drummond. The World Today: Its Patterns and Cultures. 2. ed. St. Louis [u.a.]: McGraw-Hill, 1968.

Citatione MLA (9a ed.)

Kohn, Clyde F., e Dorothy Weitz Drummond. The World Today: Its Patterns and Cultures. 2. ed. McGraw-Hill, 1968.