Rawi, N. I. binti M. ., M. Z. . Jamaludin, and F. . Abdullah. “Optisystem: An Alternative to Optoelectronics and Fiber Optics Teaching E-Laboratory”. International Journal of Asian Social Science, vol. 4, no. 2, Feb. 2014, pp. 307-13, https://archive.aessweb.com/index.php/5007/article/view/2633.