| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1969 |
|
The Dueling Machine | Holt, Rinehart and Winston | Novel | |
| September 1969 |
|
The Dueling Machine | Holt, Rinehart and Winston | Novel | |
| 1971 |
|
The Duelling Machine | Faber and Faber | Novel | |
| January 1971 |
|
Urania #558 | Mondadori | MAGAZINE | |
| January 1973 |
|
The Dueling Machine | Signet / New American Library of Canada | Novel | |
| March 1977 |
|
The Duelling Machine | Puffin | Novel | |
| September 1978 |
|
The Dueling Machine | Ace Books | Novel | 3 |
| July 1980 |
|
Die Duellmaschine | Bastei Lübbe | Novel | |
| April 1983 |
|
Urania #941 | Mondadori | MAGAZINE | 3 |
| January 1984 |
|
The Dueling Machine | Berkley Books | Novel | |
| April 1994 |
|
The Watchmen | Baen Books | Omnibus | 221 |
| November 2011 |
|
The Dueling Machine | ReAnimus Press | Novel | |
| January 2014 |
|
The Dueling Machine | ReAnimus Press | Novel |