Korten, Frances F., author
The Pathfinder Fund, 1977
Buku Teks
Lauby, Sharlyn J., author
[American Society for Training and Development Press;, ], 2005
eBooks
Axelrod, C. Warren, author
John Wiley & Sons, 1982
Buku Teks
Axelrod, Warman, author
Prentice-Hall, 1982
Buku Teks
Ross, John A., author
Columbia University, 1989
Buku Teks