Cita APA (7th ed.)

Palmer, R. R., & Colton, J. G. (1971). A history of the modern world (4th ed.). Knopf.

Cita Chicago (17th ed.)

Palmer, R. R., i Joel G. Colton. A History of the Modern World. 4th ed. New York: Knopf, 1971.

Cita MLA (9th ed.)

Palmer, R. R., i Joel G. Colton. A History of the Modern World. 4th ed. Knopf, 1971.