Del Castillo, A. T. Y. (1986). Princess Urduja: Queen of the Orient Seas before and after her time in the political orbit of the Shri-vi-ja-ya and Madjapahit Maritime Empire (a pre-Hispanic history of the Philippines). Vidal Printing Press, Printer.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিDel Castillo, Antonio Tuazon Y. Princess Urduja: Queen of the Orient Seas Before and After Her Time in the Political Orbit of the Shri-vi-ja-ya and Madjapahit Maritime Empire (a Pre-Hispanic History of the Philippines). Lingayen, Pangasinan: Vidal Printing Press, Printer, 1986.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিDel Castillo, Antonio Tuazon Y. Princess Urduja: Queen of the Orient Seas Before and After Her Time in the Political Orbit of the Shri-vi-ja-ya and Madjapahit Maritime Empire (a Pre-Hispanic History of the Philippines). Vidal Printing Press, Printer, 1986.