Abdul Razak Omar, Mahyudin Omar, Ahmad Shaharudin Abdul Latif, Anim Zalina Azizan, and Muhammad Suhaimi Sulong. MODUL INSTRUMEN DIAGNOSTIK USAHAWAN BERJAYA. Penerbit UTHM, 2017. Accessed July 18, 2024. https://penerbit.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/195.