| title | media type | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|---|
| The homosexual matrix | Unknown Binding | 978-0-07-065201-9 (0-07-065201-5) | 1975 |
| The Intimate World of Abraham Lincoln | Paperback | 978-1-56025-927-5 (1-56025-927-2) | 2006 |
| The Intimate World of Abraham Lincoln | Hardcover | 978-0-7432-6639-0 (0-7432-6639-0) | 2005 |