Cita APA (7th ed.)

Johnson, O. A. (2000). Sources of world civilization (2nd ed.). Prentice Hall.

Cita Chicago (17th ed.)

Johnson, Oliver A. Sources of World Civilization. 2nd ed. Upper Saddle River, N.J: Prentice Hall, 2000.

Cita MLA (9th ed.)

Johnson, Oliver A. Sources of World Civilization. 2nd ed. Prentice Hall, 2000.