APA (7th ed.) Citation

De la Cruz, V. M. (1977). Readability of some elementary science textbooks [microform]. Photoduplication Service. University of the Philippines Library.

Chicago Style (17th ed.) Citation

De la Cruz, Virsely Mendoza. Readability of Some Elementary Science Textbooks [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.

MLA (9th ed.) Citation

De la Cruz, Virsely Mendoza. Readability of Some Elementary Science Textbooks [microform]. Photoduplication Service. University of the Philippines Library, 1977.