Beecher, Judith A., author
Pearson - Addison Wesley, 2008
Buku Teks
Young, Cynthia Y., author
John Wiley & Sons, Inc, 2007
Buku Teks
Taylor, Howard E., author
McGraw-Hill, 1973
Buku Teks
Bogart, Kenneth P., author
Houghton Miffiln, 1977
Buku Teks
Arya, Jagdish C., author
Prentice-Hall, 1983
Buku Teks