| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Practical Gastrointestinal Endoscopy | 978-0-86542-851-5 (0-86542-851-4) | 1996 | Christopher B. Williams |
| Practical Gastrointestinal Endoscopy: The Fundamentals | 978-1-4051-5902-9 (1-4051-5902-2) | 2008 | Christopher B. Williams · Robert H. Hawes · Brian P. Saunders |
| Practical Gastrointestinal Endoscopy: The Fundamentals | 978-1-4051-0235-3 (1-4051-0235-7) | 2003 | Christopher B. Williams |