Liddell, Ken
Western Producer Prairie Books, 1977
Buku Teks
Russo, Cat Sharpe, author
[American Society for Training and Development Press, American Society for Training and Development Press], 1999
eBooks
Penner, R. C.
Princeton University Press, 1992
Buku Teks
Albrecht, Karl, 1941-, author
Halirang, 1996
Buku Teks
Ohsawa, Yukio, author
[Springer, ], 2012
eBooks