Cruz, A. C., Dayrit, N. M., & Yap, G. R. (1974). Content analysis of biology for philippine high schools: The relationships of living things, textbook and laboratory manual.
Παραπομπή σε μορφή Chicago (17η εκδ.)Cruz, Azucena C., Nenita M. Dayrit, και Guafdalupe R. Yap. Content Analysis of Biology for Philippine High Schools: The Relationships of Living Things, Textbook and Laboratory Manual. Quezon City, 1974.
Παραπομπή σε μορφή MLA (9th εκδ.)Cruz, Azucena C., et al. Content Analysis of Biology for Philippine High Schools: The Relationships of Living Things, Textbook and Laboratory Manual. 1974.
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