@article{ref1,
title="Depression and perceived reinforcement: a reconsideration",
journal="Journal of abnormal psychology",
year="1978",
author="McNitt, P. C. and Thornton, D. W.",
volume="87",
number="1",
pages="137-140",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-843X",
doi="",
url="http://dx.doi.org/"
}