Cita APA (7a ed.)

Allen, M., Gillespie, R., & Tellejohn Hayes, P. Essential thechnique: For strings intermediate technique studies.

Cita Chicago Style (17a ed.)

Allen, Michael, Robert Gillespie, y Pamela Tellejohn Hayes. Essential Thechnique: For Strings Intermediate Technique Studies.

Cita MLA (8a ed.)

Allen, Michael, et al. Essential Thechnique: For Strings Intermediate Technique Studies.