Peters, D., & Willis, S. L. (1978). Early childhood. Monterey, CA: Brooks/Cole.

Brophy, J., & Willis, S. L. (1981). Human development: A psychosocial approach. New York: St. Martin’s Press.

Schaie, K. W., & Willis, S. L. (1986). Adult development and aging (2nd ed.). Boston: Little Brown.

Willis, S. L., & Dubin, S. S. (1990). Contemporary approaches to professional updating. San Francisco: Jossey-Bass.

Schaie, K. W., & Willis, S. L. (1991). Adult development and aging (3rd ed.). New York: Harper & Row.

Schaie, K. W., & Willis, S. L. (1996). Adult development and aging (4th ed.). New York: Harper Collins.

Willis, S. L., Schaie, K. W., & Hayward, M. (Eds.). (1997). Societal mechanisms for maintaining competence in old age. New York: Springer Publishing Co.

Willis, S. L., & Reid, J. D. (1999). Life in the middle. San Diego, CA: Academic Press.

Schaie, K. W., & Willis, S. L. (2001). Psyhologija odrase dobi I starenja [Psychology of adult development and aging]. Jastrebarsko, Croatia: Naklada Slap.

Schaie, K. W., & Willis, S. L. (2002). Adult development and aging (5th ed.). New York: Prentice-Hall.

Schaie, K. W., Leventhal, H., & Willis, S. L. (Eds.). (2002). Social structures and effective health behaviors in the elderly. New York: Springer.

Schaie, K. W., & Willis, S. L. (2003). Psicologia de la edad adulta y la vejez [Adult development and aging]. (Spanish edition). Madrid, Spain: Pearson/Prentice Hall.

Schaie, K. W., & Willis, S. L. (2003). Dangdai xinli kexue mingxhu yicong [Adult development and aging]. (Simplified Chinese edition). Shanghai, China: East China Normal University Press.

Schaie, K. W., & Willis, S. L. (2005). Intellectual funcioning in adulthood: Growth, maintenance, decline and modifiability. Philadelphia, PA: American Society on Aging and MedLife Foundation.

Schaie, K. W., & Willis, S. L. (2005). Seininhatatsu to eijingu [Adult development and aging]. (Japanese translation of full version). Tokyo, Japan: Brain Shuppan.

Schaie, K. W. & Willis, S. L.( 2005). Seininhattatsu to eijingu [Adult development and aging]. (Abbreviated Japanese version). Tokyo, Japan: Brain Shuppan.

Willis, S. L., & Martin, M. (Eds.). (2005). Middle adulthood: A lifespan perspective. Thousand Oaks: Sage.

Whitbourne, S., & Willis, S. L. (Eds.). (2006). The Baby Boomers grow up. New York: Erlbaum.

Schaie, K. W., & Willis, S. L. (2007). Adult development and aging (Chinese Traditional language edition). Shangha, China: Wu-Nan Book Co.

Schaie K. W., & Willis, S. L. (Eds.). (2011). Handbook of the psychology of aging (7th ed.). San Diego, CA: Elsevier.

Schaie, K. W., & Willis, S. L. (In preparation). Adult development and aging (6th ed.). New York: Pearson/Prentice-Hall).