@book{Kramer2020,
author = {Kramer, S.},
title= {Polygamy is rare around the world and mostly confined to a few regions},
year = {2020},
URL = {https://www.pewresearch.org/short-reads/2020/12/07/polygamy-is-rare-around-the-world-and-mostly-confined-to-a-few-regions/},
address = {Washington, DC},
publisher = {Pew Research Center},
}