Gage, N. L. (1978). The scientific basis of the art of teaching. Teachers College Press, Teachers College, Columbia University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGage, N. L. The Scientific Basis of the Art of Teaching. New York: Teachers College Press, Teachers College, Columbia University, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGage, N. L. The Scientific Basis of the Art of Teaching. Teachers College Press, Teachers College, Columbia University, 1978.
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