APA aipamena

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

Chicago Style aipamena

Gregorio, Herman C. Principles and Methods of Teaching. Rev. ed. Quezon City: R. P. Garcia Pub. Co, 1960.

MLA aipamena

Gregorio, Herman C. Principles and Methods of Teaching. Rev. ed. R. P. Garcia Pub. Co, 1960.