Sanda, Mohammed-Aminu. “Managerial Self-Efficacy and Discretionary Behavior Improving Work Environment for Small Firm Performance”. Information Management and Business Review 2, no. 6 (June 15, 2011): pp. 259-266. Accessed February 23, 2025. https://ojs.amhinternational.com/index.php/imbr/article/view/906.