Hagan, Frank E., author
Kencana, 2013
Buku Teks
Hagan, Frank E., author
Nelson-Hall, 1989
Buku Teks
Gibbons, Don C., author
Prentice-Hall, 1992
Buku Teks
Roebuck, Julian B., author
Charles C. Thomas, 1967
Buku Teks
Adler, Freda
McGraw-Hill, 2007
Multimedia