University of the Philippines Diliman. College of Arts and Letters & Guban, D. (2012). Tourism in Belgium. DZUP.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUniversity of the Philippines Diliman. College of Arts and Letters और Danica Guban. Tourism in Belgium. Quezon City: DZUP, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUniversity of the Philippines Diliman. College of Arts and Letters और Danica Guban. Tourism in Belgium. DZUP, 2012.
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