Garland Publishing · Routledge
| title | media type | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|---|
| The Mark Twain Encyclopedia | Paperback | 978-0-415-89058-8 | 2011 | James D. Wilson |
| The Mark Twain Encyclopedia | Hardcover | 978-0-8240-7212-4 | 1993 | " |
| The New Mark Twain Handbook | " | 978-1-138-50207-9 | 2017 | E. Hudson Long |
| The Routledge Encyclopedia of Walt Whitman | Paperback | 978-0-415-89057-1 | 2011 | Donald D. Kummings |
| The Routledge Encyclopedia of Walt Whitman | Hardcover | 978-0-8153-1876-7 | 1998 | " |