Wan Yusuf, Wan Ahmad Ramzi, Kharauddin, Mohd Hairy, AND Ab Rasid, Mohd Fitri. " Persepsi Pelajar Diploma in Rail Signalling and Communication Technology Terhadap Penggunaan Model Color Light Signal (CLS)" Politeknik & Kolej Komuniti Journal of Life Long Learning [Online], Volume 4 Number 1 (1 December 2020)