Winter, George, author
McGraw-Hill, 1981
Buku Teks
Teorey, Toby J.
Englewood Cliffs, NJ: Prentice-Hall, 1982
Buku Teks
Ramamrutham, S.
Dhanpat Rai and Sons, 1985
Buku Teks
Parker, Harry, author
John Wiley & Sons, 1994
Buku Teks
Breyer, Donald E., author
McGraw-Hill, 1980
Buku Teks