Silver, Howard A.
Prentice-Hall, 1979
Buku Teks
Musser, Gary L., author
John Wiley and Sons, 2006
Buku Teks
Gothmann, William H.
Prentice-Hall, 1982
Buku Teks
Musser, Gary L., author
John Wiley and Sons, 2004
Buku Teks
Armstrong, James W., author
Macmillan, 1976
Buku Teks