APA-čujuhus (7. p.)

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

Chicago-čujuhus (17. p.)

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

MLA-čujuhus (9. p.)

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

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