@inbook{Lewis1979,
author = {Lewis, R.A. and Spanier, G.B.},
title= {Theorizing about the quality and stability of marriage},
year = {1979},
editor = {Burr, W.R.},
editor = {Hill, R.},
editor = {Nye, F.J.},
editor = {Reiss, J.L. },
booktitle = {Contemporary theories about the family},
address = {New York},
publisher = {Free Press},
pages = {268--294},
}