Cita APA (7a ed.)

Zautra, A. J., & Reich, J. W. (1981). Positive events and quality of life. [s.n.].

Cita Chicago Style (17a ed.)

Zautra, Alex J., y John W. Reich. Positive Events and Quality of Life. [S.l.]: [s.n.], 1981.

Cita MLA (9a ed.)

Zautra, Alex J., y John W. Reich. Positive Events and Quality of Life. [s.n.], 1981.