Morehouse, W. R.
The Bankers Publishing Co., 1918
Buku Teks
Arief Budiman, author
Fakultas Ilmu Komputer Universitas Indonesia, 2021
UI - Tugas Akhir
Plattner, Francis B., author
American Society for Training and Development Press, 1997
eBooks
Clutterbuck, David, 1947-, author
Crest Publishing House, 1999
Buku Teks
Hamlyn Publishing Group Limited, 1980
Buku Teks