Cita APA (7a ed.)

Ellefson, D., Wallbank, T. W., Taylor, A. M., & Bailkey, N. M. (1975). Civilization: Past and present (7. ed.). Scott, Foresman.

Cita Chicago Style (17a ed.)

Ellefson, Donna, T. Walter Wallbank, Alastair M. Taylor, y Nels M. Bailkey. Civilization: Past and Present. 7. ed. Chicago [u.a.]: Scott, Foresman, 1975.

Cita MLA (9a ed.)

Ellefson, Donna, et al. Civilization: Past and Present. 7. ed. Scott, Foresman, 1975.