Chawla, S., M. Agarwal, and A. Arora. “Audit of Buying Patterns of Drugs from Various Pharmacies in Northern India”. International Journal of Basic & Clinical Pharmacology, vol. 2, no. 3, Jan. 2017, pp. 326-9, https://www.ijbcp.com/index.php/ijbcp/article/view/1264.