Khan Khayru, R., Wisnujati, R. N. S., Darmawan, D. and Issalillah, F. (2021) “Pengamatan Loyalitas Merek Obat Herbal Berdasarkan Kemasan dan Harga”, Jurnal Simki Economic, 4(2), pp. 121-132. doi: 10.29407/jse.v4i2.101.