Morawski, Stefan
Routledge, 1996
Buku Teks
Cherlin, Andrew J.
McGraw-Hill, 2002
Buku Teks
Schultze, Charles L.
The Brookings Institution, 1977
Buku Teks
Zanker, Paul
Harvard University Press, 2001
Buku Teks
edited by Andrew J. Cherlin
McGraw-Hil, 2013
Buku Teks