Duct Tape Marketing
Golden
John Jantsch is a marketing consultant, speaker and author of Duct Tape Marketing, Duct Tape Selling, The Commitment Engine and The Referral Engine and the founder of the Duct Tape Marketin…
John Jantsch is a marketing consultant, speaker and author of Duct Tape Marketing, Duct Tape Selling, The Commitment Engine and The Referral Engine and the founder of the Duct Tape Marketin…