1. Introducing English Pronunciation;Baker,1982
2. The influence of sentence accent, word stress and word class on the quality of vowels;Van Bergem,1991
3. Notes on the intonation of questions in Italian;Chapallaz,1964
4. The Pronunciation of Italian: A Practical Introduction;Chapallaz,1979
5. Prosodic Systems and Intonation in English;Crystal,1969