Buku Ajar Teologi Sistematika 2: Doktrin Makhluk Rohani (Malaikat dan Iblis). [s.l.] : Yayasan Yuta Pendidikan Cerdas,2025. Disponível em: https://publisher.yayasanyutapendidikancerdas.com/index.php/yutapress/catalog/book/32. Acesso em: 23 sep. 2026.