Cita APA (7a ed.)

Mercer, S., & Kane, R. A. (1979). Helplessness and hopelessness among the institutionalized aged: An experiment. [s.n.].

Cita Chicago Style (17a ed.)

Mercer, Susan, y Rosalie A. Kane. Helplessness and Hopelessness Among the Institutionalized Aged: An Experiment. [S.l.]: [s.n.], 1979.

Cita MLA (9a ed.)

Mercer, Susan, y Rosalie A. Kane. Helplessness and Hopelessness Among the Institutionalized Aged: An Experiment. [s.n.], 1979.