McClelland, D. A. (1990). Attitudinal consequences of contact with persons with developmental disabilities: Some preliminary research findings. Dept. of Research, The Vocational and Rehabilitation Research Institute.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)McClelland, David A. Attitudinal Consequences of Contact with Persons with Developmental Disabilities: Some Preliminary Research Findings. Calgary, Alta.: Dept. of Research, The Vocational and Rehabilitation Research Institute, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)McClelland, David A. Attitudinal Consequences of Contact with Persons with Developmental Disabilities: Some Preliminary Research Findings. Dept. of Research, The Vocational and Rehabilitation Research Institute, 1990.
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