K, R. R., Prasad G, S., B, N. J., C, M. K., P, R. S. and V, R. M. G. (2021) “The Purple Book: Evaluations, Approvals and recent updates”, International Journal of Drug Regulatory Affairs, 9(3), pp. 32-36. doi: 10.22270/ijdra.v9i3.480.