Philippines. Department of Tourism. Region XIII, Caraga Region. (1997). Caraga Region XIII 1997-1998 tourism situationer. Department of Tourism.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines. Department of Tourism. Region XIII, Caraga Region. Caraga Region XIII 1997-1998 Tourism Situationer. Butuan City: Department of Tourism, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines. Department of Tourism. Region XIII, Caraga Region. Caraga Region XIII 1997-1998 Tourism Situationer. Department of Tourism, 1997.
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