R., Zaimah, et al. “Integrasi Sawit Dalam Kalangan Pekebun Kecil Sawit Di Johor Dan Sabah: Oil Palm Integration Among the Oil Palm Smallholders in Johor and Sabah”. GEOGRAFI, vol. 6, no. 1, Apr. 2018, pp. 61-70, https://ejournal.upsi.edu.my/index.php/GEOG/article/view/2080.