Cita APA (7a ed.)

Birren, J. E. (2007). Encyclopedia of gerontology (2nd ed.). Academic Press.

Cita Chicago Style (17a ed.)

Birren, James E. Encyclopedia of Gerontology. 2nd ed. Amsterdam ; Boston: Academic Press, 2007.

Cita MLA (8a ed.)

Birren, James E. Encyclopedia of Gerontology. 2nd ed. Academic Press, 2007.