Alejandro, R. (1951). Principles of teaching and supervision: A handbook for young teachers. Philippine Book Co.
Lua i Stíl Chicago (17ú heag.)Alejandro, Rufino. Principles of Teaching and Supervision: A Handbook for Young Teachers. Manila: Philippine Book Co, 1951.
Lua MLA (9ú heag.)Alejandro, Rufino. Principles of Teaching and Supervision: A Handbook for Young Teachers. Philippine Book Co, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.