Cita APA (7th ed.)

Sapalo, I. S. (1994). Background reading material on the intellectual property system of the Philippines (Rev. ed. 1994.). World Intellectual Property Organization.

Cita Chicago (17th ed.)

Sapalo, Ignacio S. Background Reading Material on the Intellectual Property System of the Philippines. Rev. ed. 1994. Geneva: World Intellectual Property Organization, 1994.

Cita MLA (9th ed.)

Sapalo, Ignacio S. Background Reading Material on the Intellectual Property System of the Philippines. Rev. ed. 1994. World Intellectual Property Organization, 1994.