Ward, S. D. (1940). Viola: A follow up course for individual or like-instrument class instruction / Sylvan D. Ward. Rubank.
Čikaški stil citiranja (17. izdanje)Ward, Sylvan D. Viola: A Follow Up Course for Individual or Like-instrument Class Instruction / Sylvan D. Ward. Miami, Fl.: Rubank, 1940.
MLA način citiranja (8. izdanje)Ward, Sylvan D. Viola: A Follow Up Course for Individual or Like-instrument Class Instruction / Sylvan D. Ward. Rubank, 1940.
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