Allen, Peter
Selling
Pitman, 1998
Buku Teks SO
Rodgers, Mark
Accelerate the sale : kick-start your personal selling style to close more sales, faster
McGraw-Hill , 2011
Buku Teks SO
Ahmad Hargi Septiawan
Evaluasi pelatihan Selling Skill karyawan bagian Sales Promotion Girl PT. Guna Layan Kuasa Jakarta Pusat = Evaluation training of Selling Skill about employees sales Promotion Girl employees PT. Guna Layan Kuasa Jakarta Pusat
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2013
UI - Skripsi Membership
Breithaupt, Tim
10 steps to sales success: the proven system that can shorten the selling cycle, double your close ratio, and significantly increase your income
American Management Association, 2003
eBooks
Allen, Robert Y.
Selling dynamics
McGraw-Hill, 1984
Buku Teks SO