| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| No B.S. Guide to Maximum Referrals and Customer Retention: The Ultimate No Holds Barred Plan to Securing New Customers and Maximum Profits | 978-1-59918-584-2 (1-59918-584-9) | 2016 | Dan S. Kennedy |