HAYCRAFT, B. (1978). The teaching of pronunciation: A class room guide. Longman.
Chicago-viite (17. p.)HAYCRAFT, Brita. The Teaching of Pronunciation: A Class Room Guide. LONDON: Longman, 1978.
MLA-viite (9. p.)HAYCRAFT, Brita. The Teaching of Pronunciation: A Class Room Guide. Longman, 1978.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.