Cita APA (7a ed.)

Kelly, J. R., Steinkamp, M. W., & Kelly, J. R. (1987). Later-life satisfaction: Does leisure contribute? [s.n.].

Cita Chicago Style (17a ed.)

Kelly, John R., Marjorie W. Steinkamp, y Janice R. Kelly. Later-life Satisfaction: Does Leisure Contribute? [S.l.]: [s.n.], 1987.

Cita MLA (9a ed.)

Kelly, John R., et al. Later-life Satisfaction: Does Leisure Contribute? [s.n.], 1987.