Sanaky, H. A. “Academic Underground (A Study of Biro Bimbingan Skripsi (BBS)/ Thesis Writing Advice Bureau in Daerah Istimewa Yogyakarta)”. Millah: Journal of Religious Studies, vol. 7, no. 2, Feb. 2008, https://journal.uii.ac.id/Millah/article/view/350.