Trietley, Harry. L.
Marcel Dekker, 1986
Buku Teks
Mandl, Matthew, author
Prentice-Hall, 1967
Buku Teks
Frederick S. Merritt and Jonathan T. Ricketts, editor
McGraw-Hill, Inc, 1994
Buku Referensi
Meyer, Carl H., author
John Wiley & Sons, 1982
Buku Teks SO
Bowles, Joseph E., author
McGraw-Hill, 1980
Buku Referensi