APA-viite (7. p.)

Department of phonetics and spoken english central institute of english and foreign language. (2014). Excercises in spoken english: Part 2 consonants (24th Ed.). Oxford University Press.

Chicago-viite (17. p.)

Department of phonetics and spoken english central institute of english and foreign language. Excercises in Spoken English: Part 2 Consonants. 24th Ed. NEW DELHI: Oxford University Press, 2014.

MLA-viite (9. p.)

Department of phonetics and spoken english central institute of english and foreign language. Excercises in Spoken English: Part 2 Consonants. 24th Ed. Oxford University Press, 2014.