APA (7 वां संस्करण) प्रशस्ति पत्र

Simon, E. (1970). Academic freedom to-day. International Social Work.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Simon, Ernst. "Academic Freedom To-day." International Social Work 1970.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Simon, Ernst. "Academic Freedom To-day." International Social Work, 1970.