Proceedings international conference:Competitiveness of Economy in the Global Market; reaching sustainable economic competitiveness opportunity and challenge at national, city, industry, company - Alfian Zein, Alvis Rozani, Antoni, Bernard Hasibuan, Budi Prijanto, Adi Kuswanto, Kartika Sari, Agustin Rusiana Sari (BUNG HATTA UNIVERSITY PRESS, 2012)