Szwacka-Mokrzycka, J., and A. Miara. “The Role of a Quality Management System for a Competitive Advantage of Enterprises”. Journal of Agribusiness and Rural Development, Vol. 29, no. 3, Dec. 2013, pp. 205-17, http://www1.up.poznan.pl/jard/index.php/jard/article/view/662.