Date, C.J., author
North Holland, 1975
Buku Teks
Martin, James, author
Prentice-Hall, 1976
Buku Teks
McNichols, Charles W., author
Prentice-Hall, 1988
Buku Teks
Olle, T. William, author
John Wiley & Sons, 1978
Buku Teks
Katzan, Harry, Jr., author
Van Nostrand Reinhold , 1975
Buku Teks