Cita APA (7a ed.)

Krabacher, T., Kalipeni, E., & Layachi, A. (2009). Africa (12th ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Krabacher, Thomas, Ezekiel Kalipeni, y Azzedine Layachi. Africa. 12th ed. Boston: McGraw-Hill, 2009.

Cita MLA (9a ed.)

Krabacher, Thomas, et al. Africa. 12th ed. McGraw-Hill, 2009.