(1999). Trade associations directory 1999. Department of Trade and Industry, Bureau of Domestic Trade.
Chicago-referens (17:e uppl.)Trade Associations Directory 1999. Makati City: Department of Trade and Industry, Bureau of Domestic Trade, 1999.
MLA-referens (9:e uppl.)Trade Associations Directory 1999. Department of Trade and Industry, Bureau of Domestic Trade, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.