Cita APA (7a ed.)

Iso-Ahola, S. E., & Weissinger, E. (1987). Leisure and boredom. [s.n.].

Cita Chicago Style (17a ed.)

Iso-Ahola, Seppo E., y Ellen Weissinger. Leisure and Boredom. [S.l.]: [s.n.], 1987.

Cita MLA (9a ed.)

Iso-Ahola, Seppo E., y Ellen Weissinger. Leisure and Boredom. [s.n.], 1987.