Sapalo, I. S. (1992). Philippine law on patents, trademarks and copyright (Background reading material on intellectual property, Philippine National Supplement) (Advanced ed.). World Intellectual Property Organization.
Chicago Style (17th ed.) CitationSapalo, Ignacio S. Philippine Law on Patents, Trademarks and Copyright (Background Reading Material on Intellectual Property, Philippine National Supplement). Advanced ed. [s.l.]: World Intellectual Property Organization, 1992.
MLA (9th ed.) CitationSapalo, Ignacio S. Philippine Law on Patents, Trademarks and Copyright (Background Reading Material on Intellectual Property, Philippine National Supplement). Advanced ed. World Intellectual Property Organization, 1992.
Warning: These citations may not always be 100% accurate.