Buletin Ekonomi ISSN: 1410-3842 Rutman Lumbantoruan DOI: https://doi.org/10.33541/buletin%20ekonomi.v21i1.583 Abstract . View 266 times Download 266 times pdf Published 2018-01-20 Issue Vol. 21 No. 1 (2017): Buletin Ekonomi ISSN: 1410-3842 Section Articles