| title | ISBN-13 (ISBN-10)  | year of publica- tion  | other author(s) | 
|---|---|---|---|
| A / B Testing: The Most Powerful Way to Turn Clicks Into Customers | 978-1-118-79241-4 (1-118-79241-6)  | 2015 | Pete Koomen | 
| A/B Testing: The Most Powerful Way to Turn Clicks Into Customers | 978-1-118-53609-4 (1-118-53609-6)  | 2013 | " |