Vecchio, Robert P., author
The Dryden, 1995
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 1997
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 1993
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 1993
Buku Teks
Kinicki, Angelo, author
McGraw-Hill, 2009
Buku Teks