APA aipamena

Birren, J. E. (2001). Psychology of aging. San Diego, Calif: Academic Press.

Chicago Style aipamena

Birren, James E. Psychology of Aging. San Diego, Calif: Academic Press, 2001.

MLA aipamena

Birren, James E. Psychology of Aging. San Diego, Calif: Academic Press, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.