Schwartz, Matthew, author
American Management Association, 2006
eBooks
Thomas, Wayne M., author
Amacom, 2008
Buku Teks
Thomas, Wayne M., author
Amacom, 2008
eBooks
Still, Richard R
Prentice Hall International, 1988
Buku Teks
Jones, John G., author
Alexander Hamilton Institute, 1961
Buku Teks