APA (7e ed.) Bronvermelding

(1999). Trade associations directory 1999. Department of Trade and Industry, Bureau of Domestic Trade.

Chicago (17e ed.) Bronvermelding

Trade Associations Directory 1999. Makati City: Department of Trade and Industry, Bureau of Domestic Trade, 1999.

MLA (9e ed.) Bronvermelding

Trade Associations Directory 1999. Department of Trade and Industry, Bureau of Domestic Trade, 1999.