Isaac, N. B. (1998). Wearing of Filipino national costume in government offices: A centennial inspiration. Manila Bulletin.
Chicago-viite (17. p.)Isaac, Norman B. "Wearing of Filipino National Costume in Government Offices: A Centennial Inspiration." Manila Bulletin 1998.
MLA-viite (9. p.)Isaac, Norman B. "Wearing of Filipino National Costume in Government Offices: A Centennial Inspiration." Manila Bulletin, 1998.
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