Bloch, Bernard and Trager, George L.1942. Outline of linguistic analysis . Baltimore: Linguistic Society of America.
2.
Bloomfield, Leonard.1933. Language. New York: Holt.
3.
Gimson, A.C.1962. An introduction to the pronunciation of English. London: Edward Arnold.
4.
International Phonetic Association.1949. The principles of the International Phonetic Association . London: Department of Phonetics, University College.
5.
Jones, Daniel.1918. An outline of English phonetics. 9th ed., 1964. Cambridge: W. Heffer.
6.
Thomas, Charles Kenneth.1958. An introduction to the phonetics of American English. New York: Ronald Press.
