(2012). "Benteng Kraton Pleret: Data Historis dan Data Arkeologi". Jurnal Berkala Arkeologi32 (2): 189. Yogyakarta: Balai Arkeologi Yogyakarta.
The paper's publisher is id:Balai Arkeologi Yogyakarta, an Indonesian government body and both authors are its empoyees. The paper indicated its source from Perpustakaan Kraton Ngayogyakarta (Yogyakarta Kraton Library)
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