Jobber, David
Selling and sales management
Prentice-Hall, 2000
 Buku Teks SO
Lambert, Brian W.
World-class selling: new sales competencies
American Society for Training & Development, 2009
 eBooks
Eades, Keith M.
Proses penjualan revolusioner yang mengubah cara anda menjual: The new solution selling: the revolutionary sales process that is changing the way people sell
Andi, 2005
 Buku Teks SO
Garofalo, Gene
The Prentice-Hall encyclopedic dictionary of selling
Prentice-Hall, 1994
 Buku Referensi
Christensen, Mary, 1951-
Be a direct selling superstar: achieve financial freedom for yourself and others as a direct sales leader
[American Management Association;, ], 2013
 eBooks