Budi Utomo และ Shabbir H. Gheewala. (2013) Environmental performance of cocoa production from monoculture system and agroforestry system in Indonesia. King Mongkut’s University of TechnologyThonburi:ม.ป.ท.Budi Utomo และ Shabbir H. Gheewala. 2013. Environmental performance of cocoa production from monoculture system and agroforestry system in Indonesia. ม.ป.ท.:King Mongkut’s University of TechnologyThonburi;Budi Utomo และ Shabbir H. Gheewala. Environmental performance of cocoa production from monoculture system and agroforestry system in Indonesia. ม.ป.ท.:King Mongkut’s University of TechnologyThonburi, 2013. Print.