Swan, M. (2005). Practical english usage (3ª ed.). Oxford University.
Chicago-čujuhus (17. p.)Swan, Michael. Practical English Usage. 3ª ed. Oxford: Oxford University, 2005.
MLA-čujuhus (9. p.)Swan, Michael. Practical English Usage. 3ª ed. Oxford University, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.