Centre for Extension and Continuing Education : Research Activities 1978 : 79, MYUPM-UNIPERMA-13-698, Container: Gedung 1/98. MAIN ARCHIVES.
Centre for Extension and Continuing Education : Research Activities 1978 : 79, MYUPM-UNIPERMA-13-698, Container: Gedung 1/98. MAIN ARCHIVES. http://putraarchives.upm.edu.my:8081/repositories/2/resources/1894 Accessed June 14, 2025.