Cita APA (7a ed.)

Hill, R. D. (2005). Positive aging: A guide for mental health professionals and consumers. W.W. Norton.

Cita Chicago Style (17a ed.)

Hill, Robert D. Positive Aging: A Guide for Mental Health Professionals and Consumers. New York [etc.]: W.W. Norton, 2005.

Cita MLA (9a ed.)

Hill, Robert D. Positive Aging: A Guide for Mental Health Professionals and Consumers. W.W. Norton, 2005.