Purukan, J., J. Posumah, and J. D. Pombengi. “KUALITAS PELAYANAN TRANSPORTASI DAMRI DI SULAWESI UTARA”. JURNAL ADMINISTRASI PUBLIK, vol. 2, no. 029, Apr. 2015, https://ejournal.unsrat.ac.id/v3/index.php/JAP/article/view/7736.