(1935). Rubank supplementary studies: Trombone : to be used with or to follow any method / R.M. Endresen.
Chicago-čujuhus (17. p.)Rubank Supplementary Studies: Trombone : To Be Used with or to Follow Any Method / R.M. Endresen. 1935.
MLA-čujuhus (9. p.)Rubank Supplementary Studies: Trombone : To Be Used with or to Follow Any Method / R.M. Endresen. 1935.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.