(1997). Survey of Income and Program Participation (SIPP) 1993 Panel United States Department of Commerce. Bureau of the Census. [electronic resource].
Citazione stile Chigago Style (17a edizione)Survey of Income and Program Participation (SIPP) 1993 Panel United States Department of Commerce. Bureau of the Census. [electronic Resource]. 1997.
Citatione MLA (9a ed.)Survey of Income and Program Participation (SIPP) 1993 Panel United States Department of Commerce. Bureau of the Census. [electronic Resource]. 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.