Hacker, Louis M., author
McGraw-Hill, 1965
Buku Teks
Gray, Richard, 1944-, author
Longman, 1991
Buku Teks
Berkowitz, Gerald M., author
Longman, 1994
Buku Teks
edited by Martin Tucker
Ungar, 1988
Buku Referensi
Quinn, Arthur Hobson, author
Irvington Publishers, 1943
Buku Teks