Fahryansyah, Y., A. M. Arfah Pattenreng, and B. Madiong. “Juridical Observation towards the Agreement of Purchase Contract Without Notary Public in Banggai Kepulauan”. Indonesian Journal of Legality of Law, vol. 1, no. 1, Jan. 2019, pp. 27-33, https://journal.unibos.ac.id/ijlf/article/view/14.