APA (7 वां संस्करण) प्रशस्ति पत्र
Class, E. C. (1931). Prescription and election in elementary-school teacher-training curricula in state teachers colleges. Teachers College, Columbia Univ.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Class, Edward C. Prescription and Election in Elementary-school Teacher-training Curricula in State Teachers Colleges. New York: Teachers College, Columbia Univ, 1931.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Class, Edward C. Prescription and Election in Elementary-school Teacher-training Curricula in State Teachers Colleges. Teachers College, Columbia Univ, 1931.
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