Shartle, C. L. (1952). Occupational information, its development and application. Prentice-Hall.
Citace podle Chicago (17th ed.)Shartle, Carroll Leonard. Occupational Information, Its Development and Application. Englewood Cliffs, NJ: Prentice-Hall, 1952.
Citace podle MLA (9th ed.)Shartle, Carroll Leonard. Occupational Information, Its Development and Application. Prentice-Hall, 1952.
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