Doukas, Konstantinos. “Effort Vs Value for Money (VfM) How to Maximize Efficiency in Services to Ensure VfM”. Advances in Social Sciences Research Journal 8, no. 4 (April 24, 2021): 305–308. Accessed November 29, 2024. http://804474.wannyin.cyou/index.php/ASSRJ/article/view/10019.