Codera, A. B. (1979). Action research in some subject areas conducted by principals I and head teachers in Cebu Division 1969-1970 [microform]. Photoduplication Service, University of the Philippines Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCodera, Arcadio B. Action Research in Some Subject Areas Conducted by Principals I and Head Teachers in Cebu Division 1969-1970 [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCodera, Arcadio B. Action Research in Some Subject Areas Conducted by Principals I and Head Teachers in Cebu Division 1969-1970 [microform]. Photoduplication Service, University of the Philippines Library, 1979.
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