Citazione Stile APA (7a Edizione)

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.

Citazione stile Chigago Style (17a edizione)

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.

Citatione MLA (9a ed.)

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.