APA (7 वां संस्करण) प्रशस्ति पत्र

Barrett, H. (1981). Speaking practically. Holt Rinehart & Winstor.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Barrett, Harold. Speaking Practically. New York: Holt Rinehart & Winstor, 1981.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Barrett, Harold. Speaking Practically. Holt Rinehart & Winstor, 1981.