Allen, Peter
Selling
Pitman, 1998
 Buku Teks
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
Universitas Indonesia, 2013
 UI - Skripsi Membership
Allen, Robert Y.
Selling dynamics
McGraw-Hill, 1984
 Buku Teks
Wingate, John W.
Fundamentals of selling
South-Western Publishing, 1959
 Buku Teks
Kurtz, David L.
Professional selling
Business Publications, 1982
 Buku Teks