@article{ref1,
title="A hierarchy of 21st birthday drinking norms",
journal="Journal of college student development",
year="2012",
author="Patrick, Megan E. and Neighbors, Clayton and Lee, Christine M.",
volume="53",
number="4",
pages="581-585",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0897-5264",
doi="10.1353/csd.2012.0060",
url="http://dx.doi.org/10.1353/csd.2012.0060"
}