Soin, Sarv Singh, author
McGraw-Hill, 1992
Buku Teks
Boss, Richard W., author
G.K. Hall Publishers, 1987
Buku Teks
edited by Colin Harris
Taylor Graham, 1987
Buku Teks
Clair, Guy St., author
Bowker, 1996
Buku Teks
edited by Patricia A. Richard-Amato, Marguerite Ann Snow
Longman, 2005
Buku Teks