APA-referens (7:e uppl.)

(1991). UP Diliman thesis and dissertation abstracts 1991. Office of Research Coordination, University of the Philippines.

Chicago-referens (17:e uppl.)

UP Diliman Thesis and Dissertation Abstracts 1991. Quezon City: Office of Research Coordination, University of the Philippines, 1991.

MLA-referens (9:e uppl.)

UP Diliman Thesis and Dissertation Abstracts 1991. Office of Research Coordination, University of the Philippines, 1991.