APA (7th ed.) Citation

Palmer, R. R., & Colton, J. (1956). A history of the modern world (Second edition.). Alfred A. Knopf.

Chicago Style (17th ed.) Citation

Palmer, R. R., and Joel Colton. A History of the Modern World. Second edition. New York: Alfred A. Knopf, 1956.

MLA (8th ed.) Citation

Palmer, R. R., and Joel Colton. A History of the Modern World. Second edition. Alfred A. Knopf, 1956.