Penano, L. C. Z. (1973). Socio-psychological predictors of academic achievement. s.n.].
Chicago Style aipamenaPenano, Leticia Cecilia Zabala. Socio-psychological Predictors of Academic Achievement. [Quezon City: s.n.], 1973.
MLA aipamenaPenano, Leticia Cecilia Zabala. Socio-psychological Predictors of Academic Achievement. s.n.], 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.