Cita APA (7a ed.)

Sapalo, I. S. (1992). Philippine law on patents, trademarks and copyright (Background reading material on intellectual property, Philippine National Supplement). World Intellectual Property Organization.

Cita Chicago Style (17a ed.)

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.

Cita MLA (9a ed.)

Sapalo, Ignacio S. Philippine Law on Patents, Trademarks and Copyright (Background Reading Material on Intellectual Property, Philippine National Supplement). World Intellectual Property Organization, 1992.