Bonner, M. (1994). Focus on grammar. Teacher's manual. An intermediate course for reference and practice. Addison-Wesley.
Chicago-čujuhus (17. p.)Bonner, Margaret. Focus on Grammar. Teacher's Manual. An Intermediate Course for Reference and Practice. Reading: Addison-Wesley, 1994.
MLA-čujuhus (9. p.)Bonner, Margaret. Focus on Grammar. Teacher's Manual. An Intermediate Course for Reference and Practice. Addison-Wesley, 1994.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.