Swan, M., & Walter, C. (2011). Oxford english grammar course: Intermediate. Oxford University Press.
Chicago-čujuhus (17. p.)Swan, Michael, juo Catherine Walter. Oxford English Grammar Course: Intermediate. New York: Oxford University Press, 2011.
MLA-čujuhus (9. p.)Swan, Michael, juo Catherine Walter. Oxford English Grammar Course: Intermediate. Oxford University Press, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.