Pancaningtyas, Sulistyani. “The Effect of 2,4 Dichlorophenoxyacetic Acid on in Vitro Callogenesis of Cocoa (Theobroma Cacao L.)”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 31, no. 2 (August 31, 2015): 90-98. Accessed September 21, 2023. https://ccrjournal.com/index.php/ccrj/article/view/67.