Pierce, Milton
Dow Jones-Irwin, 1980
Buku Teks SO
Young, Dennis
Urban Institute Press, 1972
Buku Teks
Sher, David
Amacom, 1999
Buku Teks SO
edited by Santa A. Raizen, Peter H. Rossi
National Academy Press, 1981
Buku Teks
Conway, Mal
[;American Society for Training & Development Press, American Society for Training & Development Press], 2000
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