| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Religion, What Is It? | 978-0-03-062834-4 (0-03-062834-2) | 1984 |
| Religion: What is it? | 978-0-03-015551-2 (0-03-015551-7) | 1976 |
| The twenty-seven books that changed the world, a guide to reading the New Testament | 978-0-03-052631-2 (0-03-052631-0) | 1981 |
C. T. · W.C. · W. T. · W. Tremmel · William C. · William Calloley Tremmel · William T