(1999). Trade associations directory 1999. Department of Trade and Industry, Bureau of Domestic Trade.
芝加哥风格引文Trade Associations Directory 1999. Makati City: Department of Trade and Industry, Bureau of Domestic Trade, 1999.
MLA引文Trade Associations Directory 1999. Department of Trade and Industry, Bureau of Domestic Trade, 1999.
警告：这些引文格式不一定是100％准确.