Sant, Tom
Persuasive business proposals : writing to win more customers, clients, and contracts
American Management Association, 2004
 eBooks
Sant, Tom
Persuasive business proposals : writing to win more customers, clients, and contracts
American Management Association, 2012
 eBooks
Holden, Greg
Go Google: 20 ways to reach more customers and build revenue with Google business tools
American Management Association, 2008
 eBooks
Heavybid express: bid more jobs, win more work!
HCSS, 2001
 Multimedia
Charles Himawan
Business law: contracts and business associations
Lembaga penelitian Hukum dan Kriminologi FH Unpad, 1973
 Buku Teks