Awan, W. A., Salam, A. and INAM, S. G. (2015) “The impact of marketing mix (5 Ps) elements on sales of UPS: A case of Karachi Market – Buyer’s perspective”, VFAST Transactions on Education and Social Sciences, 3(1), pp. 50–56. doi: 10.21015/vtess.v6i2.230.