APA (7th ed.) Citation

Wahl, H., & Lang, F. R. (2006). Psychological aging: A contextual view. Handbook of models for human aging.

Chicago Style (17th ed.) Citation

Wahl, Hans-Werner, and Frieder R. Lang. "Psychological Aging: A Contextual View." Handbook of Models for Human Aging 2006.

MLA (9th ed.) Citation

Wahl, Hans-Werner, and Frieder R. Lang. "Psychological Aging: A Contextual View." Handbook of Models for Human Aging, 2006.

Warning: These citations may not always be 100% accurate.