Mohamad Nizam Nazarudin, Hasnol Noordin, Pathmanathan K. Suppiah, Mohamad Razali Abdullah, Mohd Sofian Omar Fauzee, and Nagoor Meera Abdullah. “Psychological Skills Assessment and Referee Rugby Sevens Performance”. Jurnal Pemikir Pendidikan, vol. 5, no. 1, Dec. 2014, pp. 165-82, doi:10.51200/jpp.v5i1.8213.