Eales F. Frances. (2005). Cutting Edge. Elementary: Tests with answer key (5th ed.). Harlow, Longman, 2005.
Chicago-viite (17. p.)Eales F. Frances. Cutting Edge. Elementary: Tests with Answer Key. 5th ed. Harlow, Longman, 2005, 2005.
MLA-viite (9. p.)Eales F. Frances. Cutting Edge. Elementary: Tests with Answer Key. 5th ed. Harlow, Longman, 2005, 2005.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.