@misc{Ruggles2008,
author = {Ruggles, S. and Sobek, M. and Alexander, T. and Fitch, C.A. and Goeken, R. and Hall, P.K. and King, M. and Ronnander, C.},
title= {Integrated public use microdata series},
year = {2008},
address = {Minneapolis, MN},
publisher = {Minnesota Population Center [producer and distributor]},
type = {Machine-readable database},
edition = {3.0},
}