Abellon, E. B. (1974). A study of the common errors in the Pilipino written composition committed by the fourth year students of Saint Louis University Boys' High School during the school year 1968-1969 [microform]. Photoduplication Service, University of the Philippines Library.
Παραπομπή σε μορφή Chicago (17η εκδ.)Abellon, Evangeline Batoon. A Study of the Common Errors in the Pilipino Written Composition Committed by the Fourth Year Students of Saint Louis University Boys' High School During the School Year 1968-1969 [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.
Παραπομπή σε μορφή MLA (9th εκδ.)Abellon, Evangeline Batoon. A Study of the Common Errors in the Pilipino Written Composition Committed by the Fourth Year Students of Saint Louis University Boys' High School During the School Year 1968-1969 [microform]. Photoduplication Service, University of the Philippines Library, 1974.