Cunningham S. Sarah, Moor P. Peter, & Carr J. C. Jane Comyns. (2001). Cutting EDGE: Pre-Intermediate: Students' Book (4th ed.). Edinburgh, Longman, 2001.
Chicago-viite (17. p.)Cunningham S. Sarah, Moor P. Peter, ja Carr J. C. Jane Comyns. Cutting EDGE: Pre-Intermediate: Students' Book. 4th ed. Edinburgh, Longman, 2001, 2001.
MLA-viite (9. p.)Cunningham S. Sarah, et al. Cutting EDGE: Pre-Intermediate: Students' Book. 4th ed. Edinburgh, Longman, 2001, 2001.
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