edited by Alice O'Connor, Chris Tilly and Lawrence D. Bobo
Russel Sage Foundations, 2001
Buku Teks
Flanagan, William G., author
Allyn and Bacon, 1990
Buku Teks
Palen, J. John, author
McGraw-Hill, 1987
Buku Teks
Duncan, Otis Dudley, author
John Wiley & Sons, 1956
Buku Teks
edited by Larry S. Bourne
Oxford University Press, 1971
Buku Teks