Abdul Aziz S.A. Kadir, Abu Bakar Mahmud, & Chan Heun Yin. (1986). Mechanisation in agriculture: Proceedings of the seminar on mechanisation in agriculture held on 26th April 1986 in International Hall, Merlin Hotel, Kuala Lumpur , organasised by the Agricultural Institute of Malaysia (AIM). Kuala Lumpur: The Agricultural Institute of Malaysia.

Abdul Aziz S.A. Kadir, Abu Bakar Mahmud, and Chan Heun Yin. Mechanisation in Agriculture: Proceedings of the Seminar On Mechanisation in Agriculture Held On 26th April 1986 in International Hall, Merlin Hotel, Kuala Lumpur , Organasised By the Agricultural Institute of Malaysia (AIM). Kuala Lumpur: The Agricultural Institute of Malaysia, 1986.

Abdul Aziz S.A. Kadir, Abu Bakar Mahmud, and Chan Heun Yin. Mechanisation in Agriculture: Proceedings of the Seminar On Mechanisation in Agriculture Held On 26th April 1986 in International Hall, Merlin Hotel, Kuala Lumpur , Organasised By the Agricultural Institute of Malaysia (AIM). Kuala Lumpur: The Agricultural Institute of Malaysia, 1986.