Cita APA (7th ed.)

Sassmannshaus, E., & Sassmannshaus, K. (2010). Early start on the Viola. Barenreiter.

Cita Chicago (17th ed.)

Sassmannshaus, Egon, i Kurt Sassmannshaus. Early Start on the Viola. Kassel: Barenreiter, 2010.

Cita MLA (9th ed.)

Sassmannshaus, Egon, i Kurt Sassmannshaus. Early Start on the Viola. Barenreiter, 2010.