Cooper, Alfred M.
McGraw-Hill, 1963
Buku Teks
Cooper, Alfred M.
McGraw-Hill, 1952
Buku Teks
Halsey, George D.
Harper & Brothers, 1946
Buku Teks
Dowling, William F.
McGraw-Hill Kogakusha, 1978
Buku Teks
Shaver, Warren
[American Society for Training & Development Press, ], 2000
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