Sudarminto
Kiat meningkatkan naluri menjual jasa: kunci sukses di pasar global
Teori dan Praktek, 2002
 Buku Teks SO
Haig, Matt, 1975-
If you're so brilliant... how come you don't have an e-strategy?: kunci sukses bisnis online
Elex Media Komputindo, [Date of publication not identified]
 Buku Teks SO
Hill, Napoleon
Sukses dan menjadi kaya melalui persuasi
Binarupa Aksara, 1994
 Buku Teks
Morris, Thomas V.
True success : a new philosophy of excellence
G.P. Putnam`s Sons, 1994.
 Buku Teks SO
Humes. James C.
Talk your way to the top/ James C. Humes
McGraw-Hill, 1980
 Buku Teks SO