Minua Ampofo, G. K., A. A. Yabani, and P. Senadzo. “Does Sales Promotion Practices Promote Customer Retention in the Oil Marketing Industry? A Case of Goil Ghana Limited Dome-Kwabenya”. Journal of Research in Marketing (ISSN: 2292-9355), vol. 8, no. 2, Dec. 2017, pp. 669-74, doi:10.17722/jorm.v8i2.733.