Cita APA

English Language Services, & English Language Services. (1969). A practical English grammar. London: Collier Macmillan.

Citación estilo Chicago

English Language Services, y English Language Services. A Practical English Grammar. London: Collier Macmillan, 1969.

Cita MLA

English Language Services, y English Language Services. A Practical English Grammar. London: Collier Macmillan, 1969.

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