@article{Spano2006,
author = {Spano, R.},
title= {Observer Behavior as a Potential Source of Reactivity: Describing and Quantifying Observer Effects in a Large-Scale Observational Study of Police},
year = {2006},
doi = {10.1177/0049124106286331},
journal = {Sociological Methods & Research},
volume = {34},
number = {4},
pages = {521--553},
}