P. Lang · Princeton Lang Institute
| title | ISBN-13 | year of publication |
|---|---|---|
| 21st Century Dictionary of Quotations | 978-0-440-21447-2 | 1993 |
| 21st Century Dictionary of Slang | 978-0-440-21551-6 | 1994 |
| 21st Century Robert's Rules of Order | 978-0-440-21722-0 | 1995 |
| Webster's 21st Century Large Print Dictionary | 978-0-385-31643-9 | 1996 |