Routledge, 2017
eBooks
Lawrence, Richard, author
Sage, 2008
Buku Teks
Trebach, Arnold S.
Rutgers University Pres, 1964
Buku Teks
edited by Barbara Raffel Price
Clark Boardman, 1982
Buku Teks
Trojanowicz, Robert C., 1941-, author
Prentice-Hall, 1987
Buku Teks