Kreitner, Robert, author
McGraw-Hill, 2010
Buku Teks
Greenberg, Jerald, author
Pearson, Prentice Hall, 2008
Buku Teks
Starr, Cecie, author
Brooks/Cole , 2001
Buku Teks
Vecchio, Robert P., author
Dryden Press, 1995
Buku Teks
Carlson, Neil R., author
Pearson/Allyn & Bacon, 2007
Buku Teks