Opara, B. C. (2015). International Marketing. Port Harcourt: Man-Philip Publications. 2)
Opara, B. C. (2010). Marketing in Developing Countries. Port Harcourt: David Stones Publishers Ltd.
Poi, E. L. & Opara, B. C. (2021). Inventory Optimization and Customer Satisfaction of Petroleum Marketing Firms in Rivers State. Journal of Accounting, Marketing & Information Technology 8 (2), 118–133
Opara, B. C. (2010). Nigerian firms’ non-oil export involvement: An economic transformation paradigm. European Journal of Scientific Research, 40(4),547-556.
Opara, B. C. & Azuonwu, E. O. (2020). Moderating role of technology on marketing channel strategies and organizational performance of quoted brewery companies in South-South, Nigeria. RSU Journal of Strategic and Internet Business. 5(2), 1387- 1395.