APA (7 वां संस्करण) प्रशस्ति पत्र

Reid, C. L. (2018). The free voice: A guide to natural singing (50th anniversary edition.). Oxford University Press.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Reid, Cornelius L. The Free Voice: A Guide to Natural Singing. 50th anniversary edition. New York, NY: Oxford University Press, 2018.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Reid, Cornelius L. The Free Voice: A Guide to Natural Singing. 50th anniversary edition. Oxford University Press, 2018.