Saleh, A. “Motivation of Cocoa Farmers in Implementing the Cocoa Production Technology: Case at Sirenja District Donggala Regency, Central Sulawesi Province”. Pelita Perkebunan (a Coffee and Cocoa Research Journal), Vol. 26, no. 1, May 2010, doi:10.22302/iccri.jur.pelitaperkebunan.v26i1.120.