Kreitner, Robert, author
McGrw-Hill , 2001
Buku Teks
Pinder, Craig C., author
Psychology Press, Taylor & Francis Group, 2008
Buku Teks
Robbins, Stephen P., author
Pearson, 2010
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 1994
Buku Teks
Kreitner, Robert, author
McGraw-Hill, 2010
Buku Teks