Thomson, A. (1966). A practical english grammar exercises-4 Vol 4. O.U.P.
Chicago-čujuhus (17. p.)Thomson, A. A Practical English Grammar Exercises-4 Vol 4. London: O.U.P, 1966.
MLA-čujuhus (9. p.)Thomson, A. A Practical English Grammar Exercises-4 Vol 4. O.U.P, 1966.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.