Gabriela Nicolescu, Ian O'Connor, Christian Piguet, editors
[Springer, Springer], 2012
eBooks
Harris, Phillip M., author
[American Society for Training & Development Press, ], 2002
eBooks
Cottom-Winslow, Margaret, author
PBC International, 1995
Buku Teks
Forty, Adrian, author
Cameron Books, 2010
Buku Teks
edited by Arthur Cotterell
Oxford Oxford University Press , 1980
Buku Teks