Hoppock, R. (1967). Occupational information: Where to get it and how to use it in counseling and in teaching (3d ed.). McGraw-Hill.
Chicago-Zitierstil (17. Ausg.)Hoppock, Robert. Occupational Information: Where to Get It and How to Use It in Counseling and in Teaching. 3d ed. New York: McGraw-Hill, 1967.
MLA-Zitierstil (8. Ausg.)Hoppock, Robert. Occupational Information: Where to Get It and How to Use It in Counseling and in Teaching. 3d ed. McGraw-Hill, 1967.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.