Viola, J. J., Ferrari, J. R., Davis, M. I., & Jason, L. A. (2009). Measuring In-Group and Out-Group Helping in Communal Living: Helping and Substance Abuse Recovery.
Čikaški stil citiranjaViola, Judah J., Joseph R. Ferrari, Margaret I. Davis, i Leonard A. Jason. Measuring In-Group and Out-Group Helping in Communal Living: Helping and Substance Abuse Recovery. 2009.
MLA način citiranjaViola, Judah J., Joseph R. Ferrari, Margaret I. Davis, i Leonard A. Jason. Measuring In-Group and Out-Group Helping in Communal Living: Helping and Substance Abuse Recovery. 2009.
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