Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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