Ademe-Godwin, Doris, and Opuene, James Endurance. “PRODUCT ASSORTMENT AND CUSTOMER PATRONAGE OF FILLING STATIONS IN YENAGOA, BAYELSA STATE”. American Journal of Research in Humanities and Social Sciences, vol. 9, Feb. 2023, pp. 130-9, https://americanjournal.org/index.php/ajrhss/article/view/166.