Tinbergen, Jan, 1903-
McGraw-Hill, 1967
Buku Teks
Griffin, Keith B.
Addison-Wesley, 1970
Buku Teks
edited by J. Stephen Parker
Mansell, 1983
Buku Teks SO
Chakravarty, Sukhamoy
MIT Press, 1969
Buku Teks
Hastings, Sandra
American Society for Training and Development Press, 2005
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