APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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