Prastiwi, Sosio. “Pengaruh Marketing Mix Terhadap Loyalitas Konsumen J&C Cookies Di Surabaya”. Yos Soedarso Economic Journal (YEJ) 1, no. 3 (December 31, 2019): 26–34. Accessed November 25, 2024. https://ejurnal.uniyos.ac.id/index.php/ysej-server/article/view/YEJ-1304.