Penano, L. C. Z. (1977). Socio-psychological predictors of academic achievement [microform]. Photoduplication Service. University of the Philippines Library.
Čikaški stil citiranja (17. izdanje)Penano, Leticia Cecilia Zabala. Socio-psychological Predictors of Academic Achievement [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
MLA način citiranja (9. izdanje)Penano, Leticia Cecilia Zabala. Socio-psychological Predictors of Academic Achievement [microform]. Photoduplication Service. University of the Philippines Library, 1977.
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