| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Ethics: Contemporary Readings | 978-0-415-25680-3 | 2003 | Earl Spurgin · James Swindal |
| Ethics, Contemporary Readings | 978-0-415-25681-0 | 2003 | |
| Formal Ethics | 978-0-415-13066-0 | 1996 | |
| Introduction to Logic | 978-0-415-99651-8 | 2010 | |
| Introduction to Logic | 978-0-415-22675-2 | 2001 | |