APA (7th ed.) Citation

Gregorio, H. C. (1960). Principles and methods of teaching (Rev. 2nd ed.). R.P. Garcia Pub.

Chicago Style (17th ed.) Citation

Gregorio, Herman Cruz. Principles and Methods of Teaching. Rev. 2nd ed. Quezon City: R.P. Garcia Pub, 1960.

MLA (9th ed.) Citation

Gregorio, Herman Cruz. Principles and Methods of Teaching. Rev. 2nd ed. R.P. Garcia Pub, 1960.