Kodua, P., P. N. Asiamah, N. Nyathi, and J. W. Nii-Okai. “Case Study, the Flagship of Harvard Business School: Any Cases for Ghana?”. The International Journal of Business & Management, vol. 5, no. 1, Jan. 2017, http://www.internationaljournalcorner.com/index.php/theijbm/article/view/123362.