Kagramanto, L Budi, and Cita Yustisia Serfiyani. “The Principles Of Contract In Donation Based Crowdfunding”. Yuridika 34, no. 1 (January 1, 2019): 81–104. Accessed August 2, 2024. https://e-journal.unair.ac.id/YDK/article/view/11801.