Lee, Ann Fuji
Routledge, Taylor & Francis Group, 2018
Buku Teks
Spradley, James P.
Halt, Rinehart and Winston, 1979
Buku Teks
Martin, Carole
McGraw-Hill, 2012
Buku Teks
Fletcher, John
Duckworth, 1973
Buku Teks
Grosse, Eric F.
[American Society for Training & Development Press, American Society for Training & Development Press], 2002
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