Cita APA (7a ed.)

Burns, E. M., & Ralph, P. L. (1969). From ancient to contemporary (4. ed.). Norton.

Cita Chicago Style (17a ed.)

Burns, Edward McNall, y Philip Lee Ralph. From Ancient to Contemporary. 4. ed. New York: Norton, 1969.

Cita MLA (9a ed.)

Burns, Edward McNall, y Philip Lee Ralph. From Ancient to Contemporary. 4. ed. Norton, 1969.