AGUDA, N. A., and A. Y. Mahmud. “IMPACT OF MOTIVATION ON THE PRODUCTIVITY OF CEMENT COMPANY OF NORTHERN NIGERIA PLC, SOKOTO”. JOURNAL OF ECONOMICS AND ALLIED RESEARCH, vol. 6, no. 1, Mar. 2021, pp. 352-6, http://jearecons.com/index.php/jearecons/article/view/114.