Wirazilmustaan, Wirazilmustaan, and Charles Simabura. “Implementasi Prinsip Ultra Vires Di Indonesia, Inggris, Jerman, Singapura, Dan Australia”. UNES Law Review 6, no. 2 (December 9, 2023): 4762-4767. Accessed December 12, 2024. https://review-unes.com/index.php/law/article/view/1242.