@article{ref1,
title="Another Attempt at Measures of Extraversion-Introversion",
journal="Psychol Clin",
year="1933",
author="Roberts, Charles S. and Fisher, V. E.",
volume="22",
number="2",
pages="88-93",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}