Directory of Philippine Industries. (1981). Directory of Philippine exporters and importers. Directory of Philippine Industries.
Chicago Style (17th ed.) CitationDirectory of Philippine Industries. Directory of Philippine Exporters and Importers. Makati: Directory of Philippine Industries, 1981.
MLA (9th ed.) CitationDirectory of Philippine Industries. Directory of Philippine Exporters and Importers. Directory of Philippine Industries, 1981.
Warning: These citations may not always be 100% accurate.