(2006). Project on Human Development in Chicago Neighborhoods (PHDCN) Interviewer Impressions (Primary Caregiver), Wave 2, 1997-2000 / Felton J. Earls, Jeanne Brooks-Gunn, Stephen W. Raudenbush, Robert J. Sampson. [electronic resource].
Chicago-čujuhus (17. p.)Project on Human Development in Chicago Neighborhoods (PHDCN) Interviewer Impressions (Primary Caregiver), Wave 2, 1997-2000 / Felton J. Earls, Jeanne Brooks-Gunn, Stephen W. Raudenbush, Robert J. Sampson. [electronic Resource]. 2006.
MLA-čujuhus (9. p.)Project on Human Development in Chicago Neighborhoods (PHDCN) Interviewer Impressions (Primary Caregiver), Wave 2, 1997-2000 / Felton J. Earls, Jeanne Brooks-Gunn, Stephen W. Raudenbush, Robert J. Sampson. [electronic Resource]. 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.