MACKIN, R., & SEIDL, J. (1979). Exercises in english patterns and usage.-- Ed. 2. Oxford University Press.
Chicago-čujuhus (17. p.)MACKIN, Ronald, juo Jennifer SEIDL. Exercises in English Patterns and Usage.-- Ed. 2. Oxford: Oxford University Press, 1979.
MLA-čujuhus (9. p.)MACKIN, Ronald, juo Jennifer SEIDL. Exercises in English Patterns and Usage.-- Ed. 2. Oxford University Press, 1979.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.