Philippines (Republic). Patent Office. Report of the Director of Patents. [s.n.
Chicago Style (17th ed.) CitationPhilippines (Republic). Patent Office. Report of the Director of Patents. Manila: [s.n.
MLA (9th ed.) CitationPhilippines (Republic). Patent Office. Report of the Director of Patents. [s.n.
Warning: These citations may not always be 100% accurate.