Price, C.J., author
Ellis Horwood, 1990
Buku Teks
Waterman, Donald A., author
Addison-Wesley, 1987
Buku Teks
Dym, Clive L., author
McGraw-Hill, 1991
Buku Teks
Dym, Clive L., author
McGraw-Hill , 1991
Buku Teks
McGraw, Karen L., author
Prentice-Hall, 1989
Buku Teks