Osmena, S. (1977). Educational achievements of the Commonwealth: Speech delivered ... at the commencement exercises of the National University at the Metropolitan Theatre, Tuesday, March 26, 1940 [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-referens (17:e uppl.)Osmena, Sergio,President. Educational Achievements of the Commonwealth: Speech Delivered ... at the Commencement Exercises of the National University at the Metropolitan Theatre, Tuesday, March 26, 1940 [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
MLA-referens (9:e uppl.)Osmena, Sergio,President. Educational Achievements of the Commonwealth: Speech Delivered ... at the Commencement Exercises of the National University at the Metropolitan Theatre, Tuesday, March 26, 1940 [microform]. Photoduplication Service. University of the Philippines Library, 1977.