APA-čujuhus (7. p.)
Comfort, J. a. (1994). Speaking effectively: Developing speaking skills for business english. CUP.
Chicago-čujuhus (17. p.)
Comfort, Jeremy...[et al]. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: CUP, 1994.
MLA-čujuhus (9. p.)
Comfort, Jeremy...[et al]. Speaking Effectively: Developing Speaking Skills for Business English. CUP, 1994.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.