Cita APA (7th ed.)

Wilmoth Janet M. & Ferraro Kenneth F. (2007). Gerontology: Perspectives and Issues (3rd ed.). Springer Publishing Company.

Cita Chicago (17th ed.)

Wilmoth Janet M. i Ferraro Kenneth F. Gerontology: Perspectives and Issues. 3rd ed. New York: Springer Publishing Company, 2007.

Cita MLA (9th ed.)

Wilmoth Janet M. i Ferraro Kenneth F. Gerontology: Perspectives and Issues. 3rd ed. Springer Publishing Company, 2007.