Walter Lorenz and Ian Shaw, editors
Routledge, Taylor & Francis Group, 2017
Buku Teks
Morawski, Stefan, author
Routledge, 1996
Buku Teks
Cherlin, Andrew J., author
McGraw-Hill, 2002
Buku Teks
Schultze, Charles L., author
The Brookings Institution, 1977
Buku Teks
Zanker, Paul, author
Harvard University Press, 2001
Buku Teks