Buck, S. (2013). Newsletter marketing: Insider secrets to using newsletters to increase profits, get more new customers, and keep customers longer than you ever thought possible. [n. p]: The Newsletter Pro.
Chicago Style CitationBuck, Shaun. Newsletter Marketing: Insider Secrets to Using Newsletters to Increase Profits, Get More New Customers, and Keep Customers Longer Than You Ever Thought Possible. [n. p]: The Newsletter Pro, 2013.
MLA CitationBuck, Shaun. Newsletter Marketing: Insider Secrets to Using Newsletters to Increase Profits, Get More New Customers, and Keep Customers Longer Than You Ever Thought Possible. [n. p]: The Newsletter Pro, 2013.
Warning: These citations may not always be 100% accurate.