M. AMPERAWAN, M. Amperawan. Piagam Adat Lampung Marga Buay Nunyai Tahun 1937. Pringsewu, Indonesia: Utan Kayu Publishing,2026. DOI: 10.47679/books.20260306_32. Disponível em: https://ukinstitute.org/books/collections/catalog/book/32. Acesso em: 4 jun. 2026.