APA (7th ed.) Citation

Beard, B. B., Wilson, N. K., & Wilson, A. J. E. (1991). Centenarians, the new generation. Greenwood Press.

Chicago Style (17th ed.) Citation

Beard, Belle Boone, Nera K. Wilson, and Albert J. E. Wilson. Centenarians, the New Generation. New York: Greenwood Press, 1991.

MLA (9th ed.) Citation

Beard, Belle Boone, et al. Centenarians, the New Generation. Greenwood Press, 1991.