APA (7th ed.) Citation

Willis, S. L., Schaie, K. W., & Hayward, M. D. (1997). Societal mechanisms for maintaining competence in old age. Springer Pub..

Chicago Style (17th ed.) Citation

Willis, Sherry L., K. Warner Schaie, and Mark D. Hayward. Societal Mechanisms for Maintaining Competence in Old Age. New York: Springer Pub., 1997.

MLA (9th ed.) Citation

Willis, Sherry L., et al. Societal Mechanisms for Maintaining Competence in Old Age. Springer Pub., 1997.