| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| January 1974 |
|
Science Fiction, Today and Tomorrow | Harper & Row | Nonfiction | 259 |
| 1975 |
|
Science Fiction, Today and Tomorrow | Penguin Books (US) | Nonfiction | 259 |
| May 1991 |
|
Writing Science Fiction and Fantasy | St. Martin's Press | Nonfiction | 129 |
| March 1993 | Writing Science Fiction and Fantasy | St. Martin's Press | Nonfiction | 129 | |
| April 1997 |
|
Writing Science Fiction and Fantasy | St. Martin's Griffin | Nonfiction | 129 |