Croft, K. (1968). English pronunciation: A manual for teachers. Collier-Macmillan International.
Lua i Stíl Chicago (17ú heag.)Croft, Kenneth. English Pronunciation: A Manual for Teachers. New York: Collier-Macmillan International, 1968.
Lua MLA (8ú heag.)Croft, Kenneth. English Pronunciation: A Manual for Teachers. Collier-Macmillan International, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.