Syed Dawilah El-Edrus, Hussain Othman, Ahmad Esa. Tun Abdullah Hj. Ahmad Badawi : Bapa Pembangunan Modal Insan Negara. Penerbit UTHM; 2010. Accessed April 10, 2026. https://penerbit.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/282