APA (7th ed.) Citation

Gregorio, H. C. (1976). Principles and methods of teaching (Revised ed.). Garotech Pub.

Chicago Style (17th ed.) Citation

Gregorio, Herman C. Principles and Methods of Teaching. Revised ed. Quezon City: Garotech Pub, 1976.

MLA (9th ed.) Citation

Gregorio, Herman C. Principles and Methods of Teaching. Revised ed. Garotech Pub, 1976.