Potter, K. D. (1999). Educators guide to finding resources in the public domain. Phi Delta Kappa Educational Foundation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPotter, Kenyon David. Educators Guide to Finding Resources in the Public Domain. USA: Phi Delta Kappa Educational Foundation, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPotter, Kenyon David. Educators Guide to Finding Resources in the Public Domain. Phi Delta Kappa Educational Foundation, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.