OKOH, L. O.; UZOKA, P. The Importance of Variance Analysis for Costs Control in Organizations. International Journal of Economic Development Research and Investment (IJEDRI), [S. l.], v. 3, n. 2, p. 21–24, 2012. Disponível em: http://icidr.org.ng/index.php/Ijedri/article/view/814. Acesso em: 19 sep. 2024.