Bahramvash, Shiva, and Zinat Nikaeen. “Designing an Ethics Workbook for Fitness Trainers of the City of Tehran”. International Academic Journal of Business Management, vol. 3, no. 1, June 2016, pp. 118-23, https://iaiest.com/iaj/index.php/IAJBM/article/view/IAJBM1610012.