@article{Cialdini1990,
author = {Cialdini, R.B. and Reno, R.R. and Kallgren, C.A.},
title= {A focus theory of normative conduct: Recycling the concept of norms to reduce littering in public places},
year = {1990},
doi = {10.1037/0022-3514.58.6.1015},
journal = {Journal of Personality and Social Psychology},
volume = {58},
number = {6},
pages = {1015--1026},
}