Abubakari, Zakari, Paa Grant Rexford, Iddrisu Abubakari, and Ernestina Linda Bonny. 2017. “The Mediating Effect of Employee Motivation on Multi-Product Innovation and Firm Performance: A Conceptual Perspective”. The International Journal of Business & Management 5 (12). https://internationaljournalcorner.com/index.php/theijbm/article/view/125687.