@article{Smock2000,
author = {Smock, P.J.},
title= {Cohabitation in the United States: An appraisal of research themes, findings, and implications. 26: 1–20. doi:},
year = {2000},
doi = {10.1146/annurev.soc.26.1.1},
volume = {26},
pages = {1Ǿ20},
}