Chinn, P. C., Drew, C. J., & Logan, D. R. (1975). Mental Retardation: A life cycle approach. Mosby.
Lua i Stíl Chicago (17ú heag.)Chinn, Philip C., Clifford J. Drew, agus Don R. Logan. Mental Retardation: A Life Cycle Approach. Saint Louis: Mosby, 1975.
Lua MLA (9ú heag.)Chinn, Philip C., et al. Mental Retardation: A Life Cycle Approach. Mosby, 1975.
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