| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2009 | 978-0-9673826-3-0 | Barry Michael Wehrli | Essential Piano and Keyboard Technique |
| 2008 | 978-0-9673826-4-7 | Barry Michael Wehrli · Linda Ruth Wehrli | Piano Practice and Performance |
| 2007 | 978-0-9673826-8-5 | '' | Music Instruction Forms: 1-Year Journal |