Cita APA (7a ed.)

Tinsley, H. E. A. (1985). A system of classifying leisure activities in terms of the psychological benefits of participation reported by older persons. [s.n.].

Cita Chicago Style (17a ed.)

Tinsley, Howard E. A. A System of Classifying Leisure Activities in Terms of the Psychological Benefits of Participation Reported by Older Persons. [S.l.]: [s.n.], 1985.

Cita MLA (9a ed.)

Tinsley, Howard E. A. A System of Classifying Leisure Activities in Terms of the Psychological Benefits of Participation Reported by Older Persons. [s.n.], 1985.