Helmkamp, J. G. (1987). Managerial accounting. John Wiley and Sons.
Chicago-čujuhus (17. p.)Helmkamp, John G. Managerial Accounting. John Wiley and Sons, 1987.
MLA-čujuhus (9. p.)Helmkamp, John G. Managerial Accounting. John Wiley and Sons, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.