Suheri, C., Wahab, Z., Widiyanti, M. and Shihab, M. S. (2021) “The effect of price perception and sales promotion on the purchase decision of the pertamax turbo in Palembang City”, International journal of humanities, literature & arts, 5(1), pp. 5-10. doi: 10.21744/ijhla.v5n1.1810.