N. Alias and K. Ariffin, “Penglibatan British dalam penanaman koko di Pahang Barat sebelum merdeka dan kesannya kepada perkembangan tanaman koko di Pahang Barat: British involvement in cocoa cultivation at West Pahang before independent and its impact on the development of cocoa crops in West Pahang”, PERS, vol. 12, no. 2, pp. 42–52, Dec. 2020.