Greenberg, Saul, author
Elsevier, 2012
Buku Teks
Kaimann, Richard A., author
Melville Publishing, 1973
Buku Teks
Orna, Elizabeth, author
Gower, 1998
Buku Teks
Rowley, Jennifer, author
Gower , 2000
Buku Teks
Rowley, Jennifer, author
Ashgate , 2004
Buku Teks