Cita APA

English Language Services, & English Language Services. (1967). Drills and excercises in English pronunciation. New York, New York: Collier MacMillan International.

Citación estilo Chicago

English Language Services, y English Language Services. Drills and Excercises in English Pronunciation. New York, New York: Collier MacMillan International, 1967.

Cita MLA

English Language Services, y English Language Services. Drills and Excercises in English Pronunciation. New York, New York: Collier MacMillan International, 1967.

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