Bikefe, Grace, Umaru Zubairu, Simeon Araga, Faiza Maitala, Ekanem Ediuku, and Daniel Anyebe. “Corporate Social Responsibility (CSR) by Small and Medium Enterprises (SMEs): A Systematic Review”. Small Business International Review 4, no. 1 (January 1, 2020): 16-33. Accessed May 24, 2022. https://sbir.upct.es/index.php/sbir/article/view/243.