Heer, A. L. The present status of business executives in the public schools of the United States in cities of 25,000 and more inhabitants. s. n.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeer, Amos Leonard. The Present Status of Business Executives in the Public Schools of the United States in Cities of 25,000 and More Inhabitants. Kent, Ohio: s. n.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHeer, Amos Leonard. The Present Status of Business Executives in the Public Schools of the United States in Cities of 25,000 and More Inhabitants. s. n.
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