edited by Stephen J. Williams
John Wiley & Sons, 1980
Buku Teks
Brewster, Lawrence G., author
St. Martin`s Press, 1982
Buku Teks
Brewster, Lawrence G., author
Thomson wadsworth, 2004
Buku Teks
Oliver, Dawn, author
Pinter, A Cassell Imprint, 1996
Buku Teks
Pozgar, George D., author
Jones & Bartllett, 2010
Buku Teks