Cita APA (7a ed.)

Villegas, A. D. (1963). A national library. University of the Philippines.

Cita Chicago Style (17a ed.)

Villegas, Aurora D. A National Library. Quezon City: University of the Philippines, 1963.

Cita MLA (9a ed.)

Villegas, Aurora D. A National Library. University of the Philippines, 1963.