HALIM, Abdul; PITOEWAS, Berchah. Perbandingan Sistem Pemerintahan. Pringsewu, Indonesia: Utan Kayu Publishing,2025. DOI: 10.47679/20251004_13. Disponível em: https://ukinstitute.org/books/collections/catalog/book/13. Acesso em: 13 may. 2026.