Alexander, G. G. U. a. W. M. Innovations in Secondary Education. Holt, Rinehart and Winston.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAlexander, Glenys G. Unruh and William M. Innovations in Secondary Education. Holt, Rinehart and Winston.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAlexander, Glenys G. Unruh and William M. Innovations in Secondary Education. Holt, Rinehart and Winston.
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