Orr, L. L. (1999). Social experiments: Evaluating public programs with experimental methods. Sage.
Chicago-viite (17. p.)Orr, Larry L. Social Experiments: Evaluating Public Programs with Experimental Methods. Thousand Oaks, Calif: Sage, 1999.
MLA-viite (9. p.)Orr, Larry L. Social Experiments: Evaluating Public Programs with Experimental Methods. Sage, 1999.
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