Noorhana Yahya, Ami Salwani Mohamad Nor Aripin, Azizuddin A. Aziz, Hanita Daud, Hasnah Mohd Zaid, Lim Kean Pah and Norehan Maarof
American Journal of Engineering and Applied Sciences 1 ( 1 ): 53 - 56 , 2008