@article{ref1,
title="Motorcycle Gangs or Motorcycle Mafia?",
journal="Police chief",
year="1998",
author="Trethewy, Steve and Katz, Terry",
volume="65",
number="4",
pages="53-??",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0032-2571",
doi="",
url="http://dx.doi.org/"
}