Violette, J. L. Norman, author
Van Nostrand Reinhold Company, 1985
Buku Referensi
Eyges, Leonard, author
Dover Publication. Inc, 2015
Buku Teks
Portis, Alan M., author
John Wiley & Sons, 1978
Buku Teks
Silvester, P.
Prentice-Hall, 1968
Buku Teks
Vanderlinde, Jack
John Wiley & Sons, 1993
Buku Teks