Cita APA (7a ed.)

Kelly, J. R. (1993). Activity and aging: Staying involved in later life. Sage.

Cita Chicago Style (17a ed.)

Kelly, John R. Activity and Aging: Staying Involved in Later Life. Newbury Park [etc.]: Sage, 1993.

Cita MLA (9a ed.)

Kelly, John R. Activity and Aging: Staying Involved in Later Life. Sage, 1993.