Hull, John F., author
Gower Press, 1973
Buku Teks
Rage, Louis J., author
Scranton, Penn., International Textbook
Buku Teks
Schonberger, Richard John, author
N.Y. The Free Press, 1986
Buku Teks
Schonberger, Richard John, author
The Free Press , 1982
Buku Teks
Dilworth, James B., 1939-, author
McGraw-Hill, 1992
Buku Teks