Ahuja, B. N., author
Surjeet Publications, 1989
Buku Teks
Agee, Warren Kendall, editor
1982
Buku Teks
Emery, Edwin, editor
Dood, Mead & Company, 1971
Buku Teks
Severin, Werner J., author
Longman, 1991
Buku Teks
Severin, Werner J., author
Longman, 1991
Buku Teks