@book{Hackett2012,
author = {Hackett, C. and Grim, B. and Stonawski, M. and V., Skirbekk and Potančoková, M. and Abel, G.},
title= {The Global Religious Landscape. A Report on the Size and Distribution of the World’s Major Religious Groups as of 2010},
year = {2012},
address = {Washington D.C.},
publisher = {Pew Research Center},
}