Castro, A. (1976). Fifty-two years of educational service of the National University [microform]. Photoduplication Service University of the Philippines Library.
Chicago-referens (17:e uppl.)Castro, Adolfo. Fifty-two Years of Educational Service of the National University [microform]. Quezon City: Photoduplication Service University of the Philippines Library, 1976.
MLA-referens (9:e uppl.)Castro, Adolfo. Fifty-two Years of Educational Service of the National University [microform]. Photoduplication Service University of the Philippines Library, 1976.
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