C. Qotimah and S. Subarjo, “Pengaruh Viral Marketing,Kualitas Layanan,dan Persepsi Harga Terhadap Keputusan Pembelian di Kopi Kenangan Ruko Kaliurang Yogyakarta”, Journal of Humanities Education Management Accounting and Transportation, vol. 2, no. 1, p. 912–925, Jan. 2025.