Locke, Lawrence F., author
Sage, 2014
Buku Teks SO
Locke, Lawrence F., author
Sage, 1987
Buku Referensi
Jähne, Johannes, author
Edition Leipzic, 1964
Buku Teks
Thomas, R. Murray (Robert Murray), 1921-, author
Corwin Press, 2008
Buku Teks
Thomas, R. Murray (Robert Murray), 1921-, author
Bergin & Garvey, 2000
Buku Teks