P. Yukthamarani Permarupan, Menaga Mohan, Abdullah Al-Mamun and Noor Raihani Binti Zainol
International Business Management 8 ( 2 ): 136 - 141 , 2014
Suaidah Binti Hamidi, Nursalihah bt Ahmad Raston and Abdullah Al-Mamun
The Social Sciences 9 ( 3 ): 182 - 188 , 2014