Cita APA (7a ed.)

English Language Services. (1977). English pronunciation: A manual for teachers. Collier Macmillan International.

Cita Chicago Style (17a ed.)

English Language Services. English Pronunciation: A Manual for Teachers. New York, Estados Unidos: Collier Macmillan International, 1977.

Cita MLA (9a ed.)

English Language Services. English Pronunciation: A Manual for Teachers. Collier Macmillan International, 1977.