Purnama, Denta, and Adil Fadillah. “Pengaruh Personal Selling Dan Sales Promotion Terhadap Keputusan Pembelian”. Jurnal Ilmiah Manajemen Kesatuan 5, no. 1 (July 16, 2018): Page 25 – 32. Accessed March 29, 2024. https://jurnal.ibik.ac.id/index.php/jimkes/article/view/23.