Ward, S. D. (1936). Viola: A fundamental course for individual or like-instrument class instruction / Sylvan D. Ward. Rubank.
Chicago-viite (17. p.)Ward, Sylvan D. Viola: A Fundamental Course for Individual or Like-instrument Class Instruction / Sylvan D. Ward. Miami, Fl.: Rubank, 1936.
MLA-viite (8. p.)Ward, Sylvan D. Viola: A Fundamental Course for Individual or Like-instrument Class Instruction / Sylvan D. Ward. Rubank, 1936.
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