“The Effect of Product Attributes on Purchasing Decision for Palm Oil Derivatives (Case Study: Chocolate Appolo at Bina Swalayan Medan)”. Jurnal Online Pertanian Tropik 7, no. 2 (October 27, 2020): 219–226. Accessed February 4, 2026. https://idjpcr.usu.ac.id/jpt/article/view/4663.