C Niken Hapsari, et al. “ANALISIS KEPUTUSAN PEMBELIAN ULANG GALON AIR MINERAL BEBAS BPA: STUDI MAHASISWA YOGYAKARTA”. Journal of Innovation Research and Knowledge, vol. 5, no. 9, Feb. 2026, pp. 10223-36, https://mail.bajangjournal.com/index.php/JIRK/article/view/11921.