Romero, R. G. (1974). Philippine chemicals directory. Business Trends (Phils.).
Chicago Style (17th ed.) CitationRomero, Roberto G. Philippine Chemicals Directory. Caloocan City: Business Trends (Phils.), 1974.
MLA (9th ed.) CitationRomero, Roberto G. Philippine Chemicals Directory. Business Trends (Phils.), 1974.
Warning: These citations may not always be 100% accurate.