Cita APA (7a ed.)

Marcus, B. H. (1992). Self-efficacy and the stages of exercise behavior change. [s.n.].

Cita Chicago Style (17a ed.)

Marcus, Bess H. Self-efficacy and the Stages of Exercise Behavior Change. [S.l.]: [s.n.], 1992.

Cita MLA (9a ed.)

Marcus, Bess H. Self-efficacy and the Stages of Exercise Behavior Change. [s.n.], 1992.