Trevino, Linda Klebe, author
John Wiley & Sons, 2007
Buku Teks
Willmore, Joe, author
[American Society for Training and Development Press;American Society for Training and Development Press, American Society for Training and Development Press], 1998
eBooks
Brandon, Dick H., author
Brandon/System Press, 1970
Buku Teks
Chandler, John, author
McGraw-Hill, 1982
Buku Teks
Makridakis, Spyros G., author
The Free Press, 1990
Buku Teks