Duldulao, M. D. (2005). The art collector's guidebook (Rev. ed.). University of Pangasinan.
Chicago Style (17th ed.) CitationDuldulao, Manuel D. The Art Collector's Guidebook. Rev. ed. Dagupan City: University of Pangasinan, 2005.
MLA (9th ed.) CitationDuldulao, Manuel D. The Art Collector's Guidebook. Rev. ed. University of Pangasinan, 2005.
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