Cita APA (7a ed.)

Olson, J. M. (1987). Understanding and promoting exercise: A social psychological perspective. [s.n.].

Cita Chicago Style (17a ed.)

Olson, James M. Understanding and Promoting Exercise: A Social Psychological Perspective. [S.l.]: [s.n.], 1987.

Cita MLA (9a ed.)

Olson, James M. Understanding and Promoting Exercise: A Social Psychological Perspective. [s.n.], 1987.