“Examining the Effective Factors on Spectators’ Attendance in Volleyball World League in Iran”, Mediterr. J. Soc. Sci., vol. 7, no. 4 S1, p. 155, Jul. 2016, Accessed: May 15, 2024. [Online]. Available: https://www.richtmann.org/journal/index.php/mjss/article/view/9396