APA (7th ed.) Citation

Christensen, J. A. (1977). Gramatica pedagogica [microform] (2. ed.). Photoduplication Service, University of the Philippines Library.

Chicago Style (17th ed.) Citation

Christensen, J. A. Gramatica Pedagogica [microform]. 2. ed. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.

MLA (9th ed.) Citation

Christensen, J. A. Gramatica Pedagogica [microform]. 2. ed. Photoduplication Service, University of the Philippines Library, 1977.