Ward, S. D. (1940). Viola: A follow up course for individual or like-instrument class instruction / Sylvan D. Ward. Rubank.
Cita Chicago (17th ed.)Ward, Sylvan D. Viola: A Follow Up Course for Individual or Like-instrument Class Instruction / Sylvan D. Ward. Miami, Fl.: Rubank, 1940.
Cita MLA (8th ed.)Ward, Sylvan D. Viola: A Follow Up Course for Individual or Like-instrument Class Instruction / Sylvan D. Ward. Rubank, 1940.
Atenció: Aquestes cites poden no estar 100% correctes.