Saad, S., Abdullah, M.Y., Salman, A. and Lyndon, N. 2018. Ciri dan Pengaruh Pemimpin Pendapat Dalam Kalangan Pekebun Kecil Kelapa Sawit: The Characteristics and Influence of Opinion Leaders on the Palm Oil Smallholders. GEOGRAFI. 6, 3 (Nov. 2018), 44–53.