@misc{King2010,
author = {King, M. and Ruggles, S. and Alexander, J.T. and Flood, S. and Genadek, K. and Schroeder, M.B. and Trampe, B. and Vick, R.},
title= {Integrated Public Use Microdata Series, Current Population Survey: Version 3.0. },
year = {2010},
URL = {http://cps.ipums.org/cps/ },
publisher = {University of Minnesota},
address = {Minneapolis},
}