M. Nasratun, A.S. Hasrul, A. Sureena, M.A. Nurul Aini, A.R. Ruwaida, M.S. Shalyda, A. Ideris, A.S. Rozaimi, J.H. Sharifuddin and N.I.A. Ahamad Nordin
Journal of Applied Sciences 10 ( 21 ): 2701 - 2704 , 2010