Hill, G. E. (1974). Management and improvement of guidance (2nd ed.). Prentice-Hall.
Cita Chicago Style (17a ed.)Hill, George E. Management and Improvement of Guidance. 2nd ed. Englewood Cliffs, N. J: Prentice-Hall, 1974.
Cita MLA (9a ed.)Hill, George E. Management and Improvement of Guidance. 2nd ed. Prentice-Hall, 1974.
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