Saputra, N. G., R. Sulistiyowati, and J. Noffrianne. “Diversifikasi Produk Di Chatime Atealier Grand Indonesia”. Jurnal Sains Terapan Pariwisata, vol. 6, no. 2, June 2021, pp. 141-8, http://103.28.225.131/index.php/jstp/article/view/252.