@inbook{Scherpenzeel2011,
author = {Scherpenzeel, A.C. and Bethlehem, J.G.},
title= {How representative are online panels? Problems of coverage and selection and possible solutions},
year = {2011},
doi = {10.4324/9780203844922-5},
editor = {Das, P.},
editor = {Ester, P.},
editor = {Kaczmirek, L.},
booktitle = {Social and behavioral research and the internet. Advances in applied methods and research strategies},
address = {New York},
publisher = {Routledge},
}