APA (7th ed.) Citation

Whitney, D. C., & Whitney, R. V. (1996). The American presidents (8th ed.). Reader's Digest.

Chicago Style (17th ed.) Citation

Whitney, David C., and Robin Vaughn Whitney. The American Presidents. 8th ed. Pleasantville, N.Y: Reader's Digest, 1996.

MLA (9th ed.) Citation

Whitney, David C., and Robin Vaughn Whitney. The American Presidents. 8th ed. Reader's Digest, 1996.