@book{Hughes2009,
author = {Hughes, A. and Sathe, N. and Spagnola, K. },
title= {State estimates of substance use from the 2006-2007 National Surveys on Drug Use and Health},
year = {2009},
URL = {http://www.samhsa.gov/data/2k7state/2k7state.pdf},
address = {Rockville, MD},
publisher = {Office of Applied Studies, Substance Abuse and Mental Health Services Administration,NSDUH Series H-35, HHS Publication No. SMA 09-4362},
}