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Selling to anyone over the phone
Walkup, Renee P., (2011)
Telephone sales for dummies
Zeller, Dirk, (2008)
Telemarketing, cold calling & appointment making : the easy step by step guide
Rowson, Pauline, (2007)
Kaltakquise für Angsthasen
Etherington, Bob, (2008)
Selling skills for complete amateurs
Negotiation Skills for Virgins : From rookie to professional in a week
Etherington, Bob, (2009)