APA (7 वां संस्करण) प्रशस्ति पत्र

HOPPOCK, R. (1967). Occupational information: Where to get it and how touse it in counseling and in teaching.-- Ed.3. McGraw-Hill.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

HOPPOCK, Robert. Occupational Information: Where to Get It and How Touse It in Counseling and in Teaching.-- Ed.3. New York: McGraw-Hill, 1967.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

HOPPOCK, Robert. Occupational Information: Where to Get It and How Touse It in Counseling and in Teaching.-- Ed.3. McGraw-Hill, 1967.