Baetiong, L. R. (1996). Highlights of the results of a survey on the UPIS concept. Alipato : a Journal of Basic Education.
Lua i Stíl Chicago (17ú heag.)Baetiong, Lourdes R. "Highlights of the Results of a Survey on the UPIS Concept." Alipato : A Journal of Basic Education 1996.
Lua MLA (9ú heag.)Baetiong, Lourdes R. "Highlights of the Results of a Survey on the UPIS Concept." Alipato : A Journal of Basic Education, 1996.
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