| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| January 1974 |
|
Science Fiction, Today and Tomorrow | Harper & Row | Nonfiction | 183 |
| 1975 |
|
Science Fiction, Today and Tomorrow | Penguin Books (US) | Nonfiction | 183 |
| May 1992 | Inside Science Fiction: Essays on Fantastic Literature | Borgo Press | Nonfiction | 30 | |
| May 1992 |
|
Inside Science Fiction: Essays on Fantastic Literature | Borgo Press | Nonfiction | 30 |
| April 2006 |
|
Inside Science Fiction: Second Edition | Scarecrow Press | Nonfiction | 29 |