Head, Robert V.
Wiley-Interscience, 1971
Buku Referensi
Cascarino, Richard
John Wiley & Sons, 2007
Buku Teks
Woodson, R. Dodge
McGraw-Hill, 2010
Buku Teks
Waterman, Donald A.
Addison-Wesley Publishing, 1986
Buku Referensi
edited by Albert Thumann
The Fairmont Press, 1988
Buku Referensi