Baharudin, Nurhayati, et al. “A Simulation Of Basic Air Conditioning System As Teaching Tool (ABBM): Basic Air Conditioning System As Teaching Tool (ABBM)”. Research and Innovation in Technical and Vocational Education and Training, vol. 1, no. 2, Sept. 2021, pp. 151-8, https://penerbit.uthm.edu.my/periodicals/index.php/ritvet/article/view/2107.