Perera, HPN, Jusoh,M, Azam. SMF, and Sudasinghe,SRSN. “STUDY OF INTRINSIC MOTIVATION AS A PREDICTOR OF PLAYERS’ PERFORMANCE IN TEAM SPORTS”. International Journal of Advance Engineering and Research Development (IJAERD), vol. 6, no. 1, Jan. 2019, pp. 155-7, https://ijaerd.org/index.php/IJAERD/article/view/4054.