Kassim, U., C. S. Abdullah, and Z. M. Udin. 2015. “Attraction Factors in Choosing Industrialized Building System (IBS) Method over Conventional Building System”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 24 (2):338-47. https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/4581.