APA (7th ed.) Citation

Christensen, J. A. (1977). Gramatica pedagogica (2. ed.). University of the Philippines Library.

Chicago Style (17th ed.) Citation

Christensen, J. A. Gramatica Pedagogica. 2. ed. Quezon City: University of the Philippines Library, 1977.

MLA (9th ed.) Citation

Christensen, J. A. Gramatica Pedagogica. 2. ed. University of the Philippines Library, 1977.