Handel, Warren H.
Prentice-Hall, 1993
Buku Teks
Kinloch, Graham C., author
Prentice-Hall, 1981
Buku Teks
edited by Fred E. Katz
Random House, 1971
Buku Teks
Blackwell Publishers, Inc, 1999
Buku Teks
Zetterberg, Hans L.
The Bedminster Press, 1965
Buku Teks