Biech, Elaine.
ASTD Press, 2009
Multimedia
Biech, Elaine.
ASTD Press, 2009
Multimedia
Sanders, Jack, 1944-, author
Ragged Mountain Press/McGraw-Hill, 2000
Buku Referensi
Steinfeld, Jake, author
American Management Association, 2006
eBooks
Prentice Hall Press, 1989
Buku Teks