Cita APA (7th ed.)

Schwartz, A. N., & Peterson , J. A. (1979). Introduction to gerontology. Holt, Rinehart and Winston.

Cita Chicago (17th ed.)

Schwartz, Arthur N., i James A. Peterson. Introduction to Gerontology. New York: Holt, Rinehart and Winston, 1979.

Cita MLA (9th ed.)

Schwartz, Arthur N., i James A. Peterson. Introduction to Gerontology. Holt, Rinehart and Winston, 1979.