Iftikhar, B., N. Bashirullah, M. Ishtiaq, S. Khan, S. Siddique, and T. Ayaz. “CHEMICAL QUALITY ASSESSMENT OF DRINKING WATER IN DISTRICT PESHAWAR, PAKISTAN”. KHYBER MEDICAL UNIVERSITY JOURNAL, Vol. 8, no. 4, Feb. 2017, p. 171, https://www.kmuj.kmu.edu.pk/article/view/16426.