Sapalo, I. S. (1992). Philippine law on patents, trademarks and copyright (Background reading material on intellectual property, Philippine National Supplement). World Intellectual Property Organization.
Chicago-Zitierstil (17. Ausg.)Sapalo, Ignacio S. Philippine Law on Patents, Trademarks and Copyright (Background Reading Material on Intellectual Property, Philippine National Supplement). [s.l.]: World Intellectual Property Organization, 1992.
MLA-Zitierstil (9. Ausg.)Sapalo, Ignacio S. Philippine Law on Patents, Trademarks and Copyright (Background Reading Material on Intellectual Property, Philippine National Supplement). World Intellectual Property Organization, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.