APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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