Maurer, J. (2000). Focus on grammar: An advanced course for reference and practice (2a. ed.). Pearson Education.
Chicago-čujuhus (17. p.)Maurer, Jay. Focus on Grammar: An Advanced Course for Reference and Practice. 2a. ed. Nueva York: Pearson Education, 2000.
MLA-čujuhus (9. p.)Maurer, Jay. Focus on Grammar: An Advanced Course for Reference and Practice. 2a. ed. Pearson Education, 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.