Jay Conrad Levinson (2007). “Guerrilla Marketing, 4th edition: Easy and Inexpensive Strategies for Making Big Profits from Your SmallBusiness”, p.3, Houghton Mifflin Harcourt
Jay Conrad Levinson (2007). “Guerrilla Marketing, 4th edition: Easy and Inexpensive Strategies for Making Big Profits from Your SmallBusiness”, p.4, Houghton Mifflin Harcourt
Jay Conrad Levinson (2007). “Guerrilla Marketing, 4th edition: Easy and Inexpensive Strategies for Making Big Profits from Your SmallBusiness”, p.82, Houghton Mifflin Harcourt
Jay Conrad Levinson (2007). “Guerrilla Marketing, 4th edition: Easy and Inexpensive Strategies for Making Big Profits from Your SmallBusiness”, p.8, Houghton Mifflin Harcourt
Jay Conrad Levinson (2007). “Guerrilla Marketing, 4th edition: Easy and Inexpensive Strategies for Making Big Profits from Your SmallBusiness”, p.29, Houghton Mifflin Harcourt
Jay Conrad Levinson (2007). “Guerrilla Marketing, 4th edition: Easy and Inexpensive Strategies for Making Big Profits from Your SmallBusiness”, p.14, Houghton Mifflin Harcourt
Jay Conrad Levinson, Jeannie Levinson (2007). “Startup Guide to Guerrilla Marketing: A Simple Battle Plan for First-Time Marketers”, p.53, Entrepreneur Press