Snedden, D. S. (1910). The problem of vocational education. Houghton Mifflin company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSnedden, David Samuel. The Problem of Vocational Education. Boston, New York [etc.]: Houghton Mifflin company, 1910.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSnedden, David Samuel. The Problem of Vocational Education. Houghton Mifflin company, 1910.
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