Intonation is a phonetic unit

Conclusion. Intonation is a complex unity of these prosodic features of speech: melody (pitch of the voice); sentence stress; temporal characteristics (duration, tempo, pausation); rhythm; timber (voice quality). The term "prosody" is widely used in linguistic literature alongside with the term "intonation" but in the broad sense.

Reference/ Список литературы

1. 
   Bolinger, Dwight L. (1951). "Intonation: Levels Versus Configurations". Word. 7 (3): 199–200. 
   
2. 
   Couper-Kuhlen, Elizabeth (1986). An Introduction to English Prosody. Edward Arnold. ISBN 978-0-7131-6460-2.
   
3. 
   Cruttenden, Alan (1997) [1996]. Intonation (second ed.). Cambridge University Press. ISBN 978-0-521-59825-5.
   
4. 
   Crystal, David (1975). "Prosodic features and linguistic theory". The English tone of voice: essays in intonation, prosody and paralanguage. Edward Arnold.
   
5. 
   Hirst, Daniel; Di Cristo, Albert, eds. (1998). Intonation Systems: A Survey of Twenty Languages. Cambridge University Press. ISBN 978-0-521-39550-2.
   
6. 
   А.В. Зырянова. (2016). Теоретическая фонетика английского языка. Челябинск: Изд-во Юж.-Урал. гос. гуман.-пед. ун-та, 2016. – 154 с. ББК 81.432.1-1-923.
   

1^ Jones, Daniel. An Outline of English Phonetics.