Adriano, A. A. (1974). An analytical study of errors in written Pilipino committed by the first year secondary students of the Camarines Sur National College of Arts and Trades, 1969-70 [microform]. Photoduplication Service, University of the Philippines Library.
Παραπομπή σε μορφή Chicago (17η εκδ.)Adriano, Aurora Alcaraz. An Analytical Study of Errors in Written Pilipino Committed by the First Year Secondary Students of the Camarines Sur National College of Arts and Trades, 1969-70 [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.
Παραπομπή σε μορφή MLA (9th εκδ.)Adriano, Aurora Alcaraz. An Analytical Study of Errors in Written Pilipino Committed by the First Year Secondary Students of the Camarines Sur National College of Arts and Trades, 1969-70 [microform]. Photoduplication Service, University of the Philippines Library, 1974.