@article{Dogruel2013,
author = {Dogruel, Leyla and Joeckel, Sven},
year = {2013},
copyright = {http://www.uk.sagepub.com/aboutus/openaccess.htm},
title = {Video game rating systems in the US and Europe},
url = "http://dx.doi.org/10.17169/refubium-19258",
}