Nurdiansyah, Haris. “The Effect of Promotion and Product Feature on Customer Loyalty : Study At One of Knitting Companies in Bandung City”. Jurnal Computech & Bisnis (e-Journal), vol. 15, no. 2, Dec. 2021, pp. 161-7, http://jurnal.stmik-mi.ac.id/jcb/article/view/63.