Lewis, B. A., Williams, D. M., Frayeh, A. L., & Marcus, B. H. (2015). Self-Efficacy versus Perceived Enjoyment as Predictors of Physical Activity Behavior. Psychol Health.
استشهاد بنمط شيكاغوLewis, Beth A., David M. Williams, Amanda L. Frayeh, و Bess H. Marcus. "Self-Efficacy Versus Perceived Enjoyment As Predictors of Physical Activity Behavior." Psychol Health 2015.
MLA استشهادLewis, Beth A., David M. Williams, Amanda L. Frayeh, و Bess H. Marcus. "Self-Efficacy Versus Perceived Enjoyment As Predictors of Physical Activity Behavior." Psychol Health 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.