Abdul Aziz, A., Abdul Latiff, Z., Mohd. Ali, M. F., Mohammad Said, M. F., & Said, M. (2008). Performance and emission evaluations of a prototype stepped-piston engine using carburetor and direct fuel-injection systems. Penerbit UTM.

Abdul Aziz, Azhar, Zulkarnain Abdul Latiff, Mohd. Fawzi Mohd. Ali, Mohd. Farid Mohammad Said, and Mazlan Said. Performance and Emission Evaluations of a Prototype Stepped-piston Engine Using Carburetor and Direct Fuel-injection Systems. Penerbit UTM, 2008.

Abdul Aziz, Azhar, et al. Performance and Emission Evaluations of a Prototype Stepped-piston Engine Using Carburetor and Direct Fuel-injection Systems. Penerbit UTM, 2008.