Cita APA (7a ed.)

Duiker, W. J., & Spielvogel, J. J. (1998). World history (2. ed.). West/Wadsworth.

Cita Chicago Style (17a ed.)

Duiker, William J., y Jackson J. Spielvogel. World History. 2. ed. Belmont, Calif. [u.a.]: West/Wadsworth, 1998.

Cita MLA (9a ed.)

Duiker, William J., y Jackson J. Spielvogel. World History. 2. ed. West/Wadsworth, 1998.