| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Gulf Yearbook 2004 | 978-9948-400-93-6 (9948-400-93-3) | 2005 | Christian Koch · Hasanain Tawfiq Ibrahim |
| Gulf Yearbook 2005-2006 | 978-9948-432-22-7 (9948-432-22-3) | 2008 | Christian Koch · Hasanain Tawfiq Ibrahim |
| Gulf Yearbook 2006-2007 | 978-9948-434-29-0 (9948-434-29-3) | 2008 | Christian Koch · Hasanain Tawfiq Ibrahim |