HarperCollins · W. W. Norton & Company
| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Future of American Politics | Paperback | 978-0-06-090074-8 | 1967 |
| The Future While It Happened. | " | 978-0-393-09321-6 | 1974 |
| The future while it happened | Unbound | 978-0-393-05479-8 | 1973 |
| The hidden crisis in American politics | Paperback | 978-0-393-09886-0 | 1971 |
| The hidden crisis in American politics | Hardcover | 978-0-393-05370-8 | 1970 |