Sudarminto
Kiat meningkatkan naluri menjual jasa: kunci sukses di pasar global / Sudarminto
Teori dan Praktek, 2002
Buku Teks
Haig, Matt
If you're so brilliant... how come you don't have an e-strategy?: kunci sukses bisnis online / Matt Haig; penerjemah, Andreas Haryono
Elex Media Komputindo,
Buku Teks
Hill, Napoleon
Sukses dan menjadi kaya melalui Persuasi= Succeed and grow rich through persuasion / Napoleon Hill ; penerjemah, Rita S.S.
Binarupa Aksara, 1994
Buku Teks
Morris, Thomas
True success : a new philosophy of excellence / Tom Morris.
G.P. Putnam?s Sons, 1994.
Buku Teks
Humes. James C.
Talk your way to the top/ James C. Humes
McGraw-Hill , 1980
Buku Teks