Erdmann, P. (1990). Discourse and grammar: Focussing and defocussing in English. M. Niemeyer.
Chicago-čujuhus (17. p.)Erdmann, Peter. Discourse and Grammar: Focussing and Defocussing in English. Tübingen: M. Niemeyer, 1990.
MLA-čujuhus (9. p.)Erdmann, Peter. Discourse and Grammar: Focussing and Defocussing in English. M. Niemeyer, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.