Bolla, Margareth Evelyn. “KAJIAN KARAKTERISTIK KECELAKAAN SEPEDA MOTOR DI KOTA SURABAYA”. Jurnal Teknik Sipil 1, no. 1 (September 10, 2011): 67-79. Accessed August 19, 2025. https://sipil.ejournal.web.id/index.php/jts/article/view/172.