Cherly Kemala Ulfa, author
2007
UI - Tesis (Membership)
Dicky Irawan Kesuma, author
2012
UI - Tesis (Membership)
Bittel, Lester Robert, author
Addison-Wesley Publishing Company, Inc., 1987
Buku Teks
Biech, Elaine, author
ASTD press, 2009
Buku Teks
Biech, Elaine.
ASTD Press, 2009
Multimedia