DREW, C. J., LOGAN, D. R., & HARDMAN, M. L. (1986). Mental retardation: A life cycle approach .--Ed.3. A Bell and Hawell.
Chicago-čujuhus (17. p.)DREW, Clifford J., Donald R. LOGAN, juo Michael L. HARDMAN. Mental Retardation: A Life Cycle Approach .--Ed.3. Columbus: A Bell and Hawell, 1986.
MLA-čujuhus (9. p.)DREW, Clifford J., et al. Mental Retardation: A Life Cycle Approach .--Ed.3. A Bell and Hawell, 1986.
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