Catford, J. C. (1977). Fundamental problems in phonetics (1st Midland Book ed.). Indiana University Press.
Lua i Stíl Chicago (17ú heag.)Catford, John Cunnison. Fundamental Problems in Phonetics. 1st Midland Book ed. Bloomington: Indiana University Press, 1977.
Lua MLA (9ú heag.)Catford, John Cunnison. Fundamental Problems in Phonetics. 1st Midland Book ed. Indiana University Press, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.