@inbook{Clausen1972,
author = {Clausen, J.},
title= {The life course of individuals},
year = {1972},
editor = {Riley, M.W.},
editor = {Johnson, M.E.},
editor = {Foner, A.},
booktitle = {A sociology of age stratification},
address = {New York},
publisher = {Russell Sage Foundation},
pages = {457‒514},
}