APA (7th ed.) Citation

Calderon, S. G. (1976). Tulong sa pag-aaral ng wikang Ingles [microform]. Photoduplication Services. University of the Philippines Library.

Chicago Style (17th ed.) Citation

Calderon, Sofronio G. Tulong Sa Pag-aaral Ng Wikang Ingles [microform]. Quezon City: Photoduplication Services. University of the Philippines Library, 1976.

MLA (9th ed.) Citation

Calderon, Sofronio G. Tulong Sa Pag-aaral Ng Wikang Ingles [microform]. Photoduplication Services. University of the Philippines Library, 1976.

Warning: These citations may not always be 100% accurate.