Gerstner, Merrill H.
Amacom , 1974
Buku Teks
Boehme, Ann J., author
[American Management Association, ], 1999
eBooks
Kirkpatrick, Donald L., author
American Society for Training & Development, 2006
eBooks
Rae, Leslie
McGraw-Hill, 1994
Buku Referensi
Peel, Malcolm, author
Gramedia Pustaka Utama, 1993
Buku Teks