Carter, Norman H., author
Dickenson , [s.a.]
Buku Teks
Awad, Elias M., author
Prentice-Hall, 1971
Buku Teks
Thierauf, Robert J., author
John Wiley & Sons, 1980
Buku Teks
Orilia, Lawrence S., author
McGraw-Hill, 1982
Buku Teks
McLeod, Raymond, author
John Wiley & Sons, 1982
Buku Teks