(2005). Project on Human Development in Chicago Neighborhoods (PHDCN) Systematic Social Observation, 1995 / Felton J. Earls, Stephen W. Raudenbush, Albert J. ReissJr., Robert J. Sampson. [electronic resource].
Chicago-referens (17:e uppl.)Project on Human Development in Chicago Neighborhoods (PHDCN) Systematic Social Observation, 1995 / Felton J. Earls, Stephen W. Raudenbush, Albert J. ReissJr., Robert J. Sampson. [electronic Resource]. 2005.
MLA-referens (9:e uppl.)Project on Human Development in Chicago Neighborhoods (PHDCN) Systematic Social Observation, 1995 / Felton J. Earls, Stephen W. Raudenbush, Albert J. ReissJr., Robert J. Sampson. [electronic Resource]. 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.