Cita APA (7th ed.)

Philippine. University. Library. (1974). Philippine union catalog. Apr.-June 1974. University of the Philippines Library.

Cita Chicago (17th ed.)

Philippine. University. Library. Philippine Union Catalog. Apr.-June 1974. Quezon City: University of the Philippines Library, 1974.

Cita MLA (9th ed.)

Philippine. University. Library. Philippine Union Catalog. Apr.-June 1974. University of the Philippines Library, 1974.