| title | media type | ISBN-13 | year of publication | |
|---|---|---|---|---|
| The Road to Galaxy Formation | Taschenbuch | 978-3-642-09157-5 | 2010 | |
| The Road to Galaxy Formation | Gebunden | 978-3-540-72534-3 | 2007 | |
| The Road to Galaxy Formation | Hardcover | 978-1-85233-574-8 | 2002 | |
| The Sky at Einstein's Feet | Broschiert | 978-0-387-50773-6 | 2008 | |
| The Sky at Einstein's Feet | Paperback | 978-0-387-26130-0 | 2005 |
C. K. · W.C. · W. K. · William C. · William K. · William Keel