Business to business direct marketing: proven direct response methods to generate more leads and sales by Robert W. Bly, 1998
The 7 laws of direct marketing: profit-producing "insider" secrets they won't teach you in business schoolby Till Boadella, 2015
The direct-mail solution: a business owner's guide to building a lead-generating, sales-driving, money-making direct-mail campaignby Craig Simpson with Dan S. Kennedy, 2014
The no B.S guide to direct marketing (3rd ed.)by Dan S. Kennedy, 2018
Write on target: the direct marketer's copywriting handbookby Donna Baier Stein and Floyd Kemske, 1997
