Rizaldi, Mohammad. “Komparasi Sign System Outdoor Dan Indoor Pada Kawasan Indonesia Convention Exhibiton, BSD”. Ultimart: Jurnal Komunikasi Visual 6, no. 2 (November 12, 2016): 59-63. Accessed September 24, 2020. http://ejournals.umn.ac.id/index.php/FSD/article/view/382.