Kemp, C. Gratton
Hoghton Mifflin, 1964
Buku Teks
Benny Hoedoro Hoed, author
Fakultas Sastra-UI, 1995
Buku Teks
Goldberg, Alvin A., author
UI-Press, 1985
Buku Teks
Bion, W.R.
Basic Book, Inc. , 1961
Buku Teks
Chalofsky, Neal, author
American Society for Training & Development Press, 2001
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