Alejandro, R. (1951). Principles of teaching and supervision: A handbook for young teachers. Philippine Book Co.
Chicago-referens (17:e uppl.)Alejandro, Rufino. Principles of Teaching and Supervision: A Handbook for Young Teachers. Manila: Philippine Book Co, 1951.
MLA-referens (9:e uppl.)Alejandro, Rufino. Principles of Teaching and Supervision: A Handbook for Young Teachers. Philippine Book Co, 1951.
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