Cita APA

Biber, D. (1999). Longman grammar of spoken and written English. New York: Longman.

Citación estilo Chicago

Biber, Douglas. Longman Grammar of Spoken and Written English. New York: Longman, 1999.

Cita MLA

Biber, Douglas. Longman Grammar of Spoken and Written English. New York: Longman, 1999.

Precaución: Estas citas no son 100% exactas.