Christantyo J. KUALITAS PRODUK DAN LAYANAN TERHADAP KEPUASAN PELANGGAN BLACK KAWA COFFEE SURABAYA. PERFORMA [Internet]. 2020 May 1 [cited 2026 Mar. 12];5(1):72-8. Available from: https://journal.uc.ac.id/index.php/performa/article/view/1304