Mascull, Bill
Collins Cobuild: key words in business / Bill Mascull
HarperCollins Pub , 1996
 Buku Teks
Smith, Daniel
How to think like bill gates.
Michael O'Mara Books Limited, 2015
 Buku Teks
Gates, Bill
Business @ the speed of thought : menggunakan sistem saraf digital
Gramedia, 2000
 Buku Teks
Mascull, Bill
Collins cobuild key words in the media / Bill Mascull
Harper Collins Pub. , 1995
 Buku Teks
Collins business German
edited by Stephen Clarke
Harper Collins, 1995
 Buku Referensi