1. K. G.Berger, S. M.Martin, Palm Oil, The Cambridge World History of Food (Eds: K. F. Kiple, K. C. Ornelas), Cambridge University Press, Cambridge 2000.
2. The Oil Palm Worldwide, 2007. http://fedepalma.org/world.htm.
3. J. W.van Gelder, Greasy Palms: European Buyers of Indonesian Palm Oil, Friends of the Earth, The Netherlands 2004.
4. Palm Oil, National Agency for Trade Export Development, Ministry of Trade Republic of Indonesia, Jakarta 2007.
5. Properties and Utilization of Kernel Meal in Layer Diets;Pantzaris;Poultry Sci.,2002