APA (7th ed.) Citation

Aiken, L. R. (1995). Aging: An introduction to gerontology. Sage Publications.

Chicago Style (17th ed.) Citation

Aiken, Lewis R. Aging: An Introduction to Gerontology. Thousand Oaks (California) [etc.]: Sage Publications, 1995.

MLA (9th ed.) Citation

Aiken, Lewis R. Aging: An Introduction to Gerontology. Sage Publications, 1995.