@article{Gittelman2015,
author = {Gittelman, S.H. and Thomas, R.K. and Lavrakas, P.J. and Lange, V.},
title= {Quota controls in survey research: A test of accuracy and intersource reliability in online samples},
year = {2015},
doi = {10.2501/JAR-2015-020},
volume = {55},
number = {4},
pages = {368--379},
}