Huseman, Richard C., author
Allyn and Bacon, 1977
Buku Teks
Kreitner, Robert, author
McGraw-Hill, 2010
Buku Teks
Vecchio, Robert P., author
Dryden Press, 1995
Buku Teks
Kreitner, Robert, author
McGrw-Hill , 2001
Buku Teks
Luthans, Fred, author
McGraw-Hill , 1985
Buku Teks