Burton, O. V., Cross, W., & Campbell, E. (2014). Penn Center: A history preserved. The University of Georgia Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBurton, Orville Vernon, Wilbur Cross, और Emory Campbell. Penn Center: A History Preserved. Athens, Georgia: The University of Georgia Press, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBurton, Orville Vernon, et al. Penn Center: A History Preserved. The University of Georgia Press, 2014.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.