Boyd, Branford B., author
McGraw-Hill , 1984
Buku Teks
Haimann, Theo, author
South-Western Pub., 1982
Buku Teks
Leonard , Edwin C., Jr., author
South-Western Cengage Learning, 2013
Buku Teks
Mosley, Donald C., author
South-Western Publishing, 1985
Buku Teks
American Society for Training and Development Research
American Society for Training & Development, 2011
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