Garfunkel, F. (1967). Observation of teachers and teaching: Strategies and applications. Office of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGarfunkel, Frank. Observation of Teachers and Teaching: Strategies and Applications. Washington: Office of Education, 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGarfunkel, Frank. Observation of Teachers and Teaching: Strategies and Applications. Office of Education, 1967.
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