Tester, Jefferson W
Prentice-Hall, 1997
Buku Teks
Sandler, Stanley, author
John Wiley & Sons, 2006
Buku Teks
Lee, John Francis, author
Addison-Wesley, 1963
Buku Teks
Carrington, Gerald, author
Oxford University Press, 1994
Buku Teks
Lewis, Gilbert Newton, author
McGraw-Hill, 1961
Buku Teks