APA (7th ed.) Citation

Diehl, M., & Wahl, H. (2020). The psychology of later life: A contextual perspective. American Psychological Association. https://doi.org/10.1037/0000185-000

Chicago Style (17th ed.) Citation

Diehl, Manfred, and Hans-Werner Wahl. The Psychology of Later Life: A Contextual Perspective. Washington: American Psychological Association, 2020. https://doi.org/10.1037/0000185-000.

MLA (9th ed.) Citation

Diehl, Manfred, and Hans-Werner Wahl. The Psychology of Later Life: A Contextual Perspective. American Psychological Association, 2020. https://doi.org/10.1037/0000185-000.