APA-viite (7. p.)

Hashemi L. Louise & Thomas B. Barbara. (2010). Cambridge Grammar for PET with answers: Self-study grammar reference and practice (5th ed.). Cambridge, Cambridge University Press, 2010.

Chicago-viite (17. p.)

Hashemi L. Louise ja Thomas B. Barbara. Cambridge Grammar for PET with Answers: Self-study Grammar Reference and Practice. 5th ed. Cambridge, Cambridge University Press, 2010, 2010.

MLA-viite (9. p.)

Hashemi L. Louise ja Thomas B. Barbara. Cambridge Grammar for PET with Answers: Self-study Grammar Reference and Practice. 5th ed. Cambridge, Cambridge University Press, 2010, 2010.