Mohd Hashim, H. F. “PENGGUNAAN EASY LEARNING KIT (ELK): REFRIGERATOR SYSTEM BAGI PELAJAR SIJIL TEKNOLOGI PENYEJUKAN DAN PENYAMANAN UDARA (SPU) DI KOLEJ KOMUNITI HULU LANGAT (KKHL): Application of Easy Learning Kit (ELK): Refrigeration System for Student Undertaking Certification in Refrigeration and Air Conditioning at Hulu Langat Community Collage”. International Journal of Humanities Technology and Civilization, vol. 6, no. (S2), Mar. 2021, pp. 50-55, doi:10.15282/ijhtc.v6i(S2).6251.