Cita APA (7a ed.)

Tappe, M. K., Duda, J. L., & Menges-Ehrnwald, P. (1990). Personal investment predictors of adolescent motivational orientation toward exercise. [s.n.].

Cita Chicago Style (17a ed.)

Tappe, Marlene K., Joan L. Duda, y Patricia Menges-Ehrnwald. Personal Investment Predictors of Adolescent Motivational Orientation Toward Exercise. [S.l.]: [s.n.], 1990.

Cita MLA (9a ed.)

Tappe, Marlene K., et al. Personal Investment Predictors of Adolescent Motivational Orientation Toward Exercise. [s.n.], 1990.