Professional. (2019). Copyright Act 1957. Professional Book.
Chicago-čujuhus (17. p.)Professional. Copyright Act 1957. Delhi: Professional Book, 2019.
MLA-čujuhus (9. p.)Professional. Copyright Act 1957. Professional Book, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.