Rotinsulu, Eric, et al. “PENGARUH HARGA, PRODUK DAN PROMOSI TERHADAP LOYALITAS KONSUMEN BIG JAY FAMILY KARAOKE”. JURNAL ADMINISTRASI PUBLIK, vol. 2, no. 029, Apr. 2015, https://ejournal.unsrat.ac.id/v3/index.php/JAP/article/view/7735.