@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, F.R.},
editor = {Nye, I.},
editor = {Reiss, I.L.},
booktitle = {Contemporary theories about the family: Volume I: Research-based theories},
address = {New York},
publisher = {The Free Press},
pages = {268--294},
}