M. Rustam Mohd Rameli, A. Mohd Kosnin, Y. Kee Jiar, and Z. Mohamad Ashari, “Cluster analysis on Malaysian student’s achievement goals orientation in mathematics from multiple goal perspective”, IJET, vol. 7, no. 2.10, pp. 113–116, Apr. 2018, doi: 10.14419/ijet.v7i2.10.10967.