Lumbanbatu, H. A. “Penilaian Kinerja Pelayanan Infrastruktur Dasar Kawasan Metropolitan Di Indonesia (Kasus Studi: Air Bersih, Air Limbah, Drainase, Dan Sampah)”. Journal of Regional and City Planning, vol. 21, no. 3, Dec. 2010, pp. 227-42, https://journals.itb.ac.id/index.php/jpwk/article/view/4163.