Kamu, Assis, Bonaventure Boniface, Abdul Rahim Awang, Affendy Hassan, Mohammad Amizi Ayob, and Siti Kalsom Yulo. 2016. “Attitude of Oil Palm Smallholders towards Ganoderma Disease”. International Journal of Economics and Financial Issues 6 (7S):177-80. https://www.econjournals.com/index.php/ijefi/article/view/3603.