APA (7th ed.) Citation

Diehl, M., & Wahl, H. (2020). The psychology of later life: A contextual perspective. American Psychological Association.

Chicago Style (17th ed.) Citation

Diehl, Manfred, and Hans-Werner Wahl. The Psychology of Later Life: A Contextual Perspective. Washington: American Psychological Association, 2020.

MLA (9th ed.) Citation

Diehl, Manfred, and Hans-Werner Wahl. The Psychology of Later Life: A Contextual Perspective. American Psychological Association, 2020.