Shartle, C. L. (1952). Occupational information, its development and application (2nd ed.). Prentice-Hall.
Chicago-viite (17. p.)Shartle, Carroll Leonard. Occupational Information, Its Development and Application. 2nd ed. Englewood Cliffs, N. J: Prentice-Hall, 1952.
MLA-viite (9. p.)Shartle, Carroll Leonard. Occupational Information, Its Development and Application. 2nd ed. Prentice-Hall, 1952.
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