@inbook{Emerson1972b,
author = {Emerson, R.M.},
title= {Exchange theory, part II: Exchange relations and networks},
year = {1972b},
editor = {Berger, J.},
editor = {Zelditch, M.},
editor = {Anderson, B.},
booktitle = {Sociological theories in progress, Vol. 2},
address = {Boston},
publisher = {Houghton Mifflin},
pages = {58--87},
}