Douglas, F. The effects of social facilitation upon the motor performance of institutionalized and non-institutionalized moderately retarded adolescents. University Microfilms International.
Chicago-referens (17:e uppl.)Douglas, Frederick. The Effects of Social Facilitation upon the Motor Performance of Institutionalized and Non-institutionalized Moderately Retarded Adolescents. Ann Arbor, Mich.: University Microfilms International.
MLA-referens (8:e uppl.)Douglas, Frederick. The Effects of Social Facilitation upon the Motor Performance of Institutionalized and Non-institutionalized Moderately Retarded Adolescents. University Microfilms International.
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