Stone, Bob
Successful telemarketing : opportunities and techniques for increasing sales and profits/ Bob Stone and John Wyman
Prentice-Hall, 1986
 Buku Teks
Boyan, Lee, author
Successful cold call selling
American Management Association, 1989
 eBooks
William, Miller, author
Knock your socks off prospecting: how to cold call, get qualified leads, and make more money
American Management Association, 2005
 eBooks
Roman, Murray, author
Telemarketing campaigns that work! / Murray Roman
McGraw-Hill, 1983
 Buku Teks
Walkup, Renee P., author
Selling to anyone over the phone
American Management Association, 2006
 eBooks
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