Ward, S. D. (1942). Rubank intermediate method: Cello, ; a follow up course for individual or like-instrument class instruction. Rubank.
Lua i Stíl Chicago (17ú heag.)Ward, Sylvan D. Rubank Intermediate Method: Cello, ; a Follow Up Course for Individual or Like-instrument Class Instruction. Chicago: Rubank, 1942.
Lua MLA (9ú heag.)Ward, Sylvan D. Rubank Intermediate Method: Cello, ; a Follow Up Course for Individual or Like-instrument Class Instruction. Rubank, 1942.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.