John Jantsch

John Jantsch (born April 2, 1960) is an author, speaker, and marketing consultant who specializes in assisting small businesses. He is the author of Duct Tape Marketing, The Referral Engine, and The Commitment Engine.

John Jantsch

John Jantsch (born April 2, 1960) is an author, speaker, and marketing consultant who specializes in assisting small businesses. He is the author of Duct Tape Marketing, The Referral Engine, and The Commitment Engine.