“EVALUATION OF THE RELATIONSHIP BETWEEN PSYCO-SOCIAL ENVIRONMENTS OF CLASS AND EDUCATION PROGRESS OF STUDENTS”, SJBEM, vol. 2, no. (12), pp. 22–29, Dec. 2014, Accessed: Jun. 27, 2026. [Online]. Available: http://www.singaporeanjbem.com/index.php/SJBEM/article/view/297