(1995). Survey of Income and Program Participation (SIPP) 1992 Panel United States Department of Commerce. Bureau of the Census. [electronic resource].
Chicago-referens (17:e uppl.)Survey of Income and Program Participation (SIPP) 1992 Panel United States Department of Commerce. Bureau of the Census. [electronic Resource]. 1995.
MLA-referens (9:e uppl.)Survey of Income and Program Participation (SIPP) 1992 Panel United States Department of Commerce. Bureau of the Census. [electronic Resource]. 1995.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.