Maddi, Salvatore R., author
AMACOM, 2005
Buku Teks
Maddi, Salvatore R., author
[American Management Association, ], 2005
eBooks
Johnson, Falk S., author
Houghton Mifflin, 1965
Buku Teks
Gawain, Shakti, author
Whatever Publisher, 2002
Buku Teks
Levine, Stuart R., author
Simon and Schuster, 1993
Buku Teks