Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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