Riyadi, Tunjung. “Kajian Visualisasi Iklan Layanan Masyarakat “Sumpah Pemuda””. Humaniora 2, no. 1 (April 30, 2011): 583–589. Accessed May 9, 2025. https://journal.binus.ac.id/index.php/Humaniora/article/view/3071.