Allen, M., Gillespie, R., & Tellejohn Hayes, P. Essential thechnique: For strings intermediate technique studies.
Lua i Stíl Chicago (17ú heag.)Allen, Michael, Robert Gillespie, agus Pamela Tellejohn Hayes. Essential Thechnique: For Strings Intermediate Technique Studies.
Lua MLA (8ú heag.)Allen, Michael, et al. Essential Thechnique: For Strings Intermediate Technique Studies.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.