APA (7th ed.) Citation

Findley, C. V., & Rothney, J. A. M. (1990). Twentieth-century world (2nd ed.). Houghton Mifflin.

Chicago Style (17th ed.) Citation

Findley, Carter V., and John Alexander Murray Rothney. Twentieth-century World. 2nd ed. Boston: Houghton Mifflin, 1990.

MLA (9th ed.) Citation

Findley, Carter V., and John Alexander Murray Rothney. Twentieth-century World. 2nd ed. Houghton Mifflin, 1990.