Hollis, E. V. (1945). Toward improving Ph.D. programs. American council on education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHollis, Ernest Victor. Toward Improving Ph.D. Programs. Washington, D. C: American council on education, 1945.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHollis, Ernest Victor. Toward Improving Ph.D. Programs. American council on education, 1945.
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