APA (7 वां संस्करण) प्रशस्ति पत्र

Gregg, J. R. (1962). Applied secretarial practice (5th ed.). Gregg Pub. Division, McGraw-Hill.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Gregg, John Robert. Applied Secretarial Practice. 5th ed. New York: Gregg Pub. Division, McGraw-Hill, 1962.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Gregg, John Robert. Applied Secretarial Practice. 5th ed. Gregg Pub. Division, McGraw-Hill, 1962.