@inbook{Heinemann1990,
author = {Heinemann, G.D. and Evans, PL.},
title= {Widowhood: Loss, change, and adaptation},
year = {1990},
editor = {Brubaker, T.H.},
booktitle = {Family relationships in later life},
address = {Newbury Park, CA},
publisher = {Sage},
pages = {142‒168},
}