Mauch, James E.
Marcel Dekker, 1998
Buku Referensi
Madsen, David, 1929-
Jossey-Bass, 1992
Buku Teks
Johson, Jean
Bedford Books, 1987
Buku Teks
Thomas, Robert Murray, 1921-
Corwin Press, 2008
Buku Teks
Thomas, Robert Murray, 1921-
Bergin & Garvey, 2000
Buku Teks