| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Insider Seo & Ppc: Get Your Website to the Top of the Search Engines | 978-0-87573-088-2 (0-87573-088-4) | 2006 | Andreas Ramos |
| Insider's Guide To SEO: How To Get Your Website To The Top Of The Search Engines | 978-0-87573-051-6 (0-87573-051-5) | 2004 | " |
| Search Engine Marketing | 978-0-07-159733-3 (0-07-159733-6) | 2008 | " |