@inbook{Pollard2007,
author = {Pollard, M.S. and Harris, K.M.},
title= {Measuring cohabitation in add health},
year = {2007},
editor = {Hofferth, S.L.},
editor = {Casper, L.M.},
booktitle = {Handbook of measurement issues in family research},
address = {Mahwah, NJ},
publisher = {Lawrence Erlbaum Associates},
pages = {35--51},
}