Diric, A. S. (1988). Upgrading teaching competencies of public elementary school teachers in Batac District I, Division of Ilocos Norte, through in-service education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDiric, Angela S. Upgrading Teaching Competencies of Public Elementary School Teachers in Batac District I, Division of Ilocos Norte, Through In-service Education. 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDiric, Angela S. Upgrading Teaching Competencies of Public Elementary School Teachers in Batac District I, Division of Ilocos Norte, Through In-service Education. 1988.
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