Eloff, M, MA Monyeki, and HW Grobbelaar. “A Survey of Mental Skills Training Among South African Field Hockey Players at Tertiary Institutions”. African Journal for Physical Activity and Health Sciences 17, no. 1 (April 11, 2011). Accessed October 12, 2026. https://www.ajol.info/index.php/ajpherd/article/view/65243.