K.k. · Kerstin Krieglsteing · Kristian Kroschel · Kristine K. Kershul · Kristinek Kershul
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Chinese in 10 Minutes a Day | 978-0-944502-10-5 | 2002 | Kristine K. Kershu |
| CHINESE in 10 minutes a day® with CD-ROM | 978-1-931873-01-7 | 2008 | |
| FRENCH in 10 minutes a day® AUDIO CD | 978-1-931873-87-1 | 2005 | |
| Hebrew In Minutes a Day | 978-0-944502-56-3 | 1992 | |
| INGLÉS en 10 minutos al día® con CD-ROM | 978-1-931873-05-5 | 2007 | |
| JAPANESE in 10 minutes a day® with CD-ROM | 978-1-931873-07-9 | 2008 | |