Hidayah, I., 		Kuswandi, B., & 		Wulandari, L.
2014 Sep  7.  Deteksi Kemurnian Air Zamzam  Menggunakan Metode  Spektrofotometri Near Infra Red (NIR) dan Kemometrik (Detection of Zamzam Water Purity Using Near Infra Red Spectroscopy (NIR) and Chemometrics). Pustaka Kesehatan. [Online] 2:3