Παραπομπή APA

Douglas Biber ... [et al.]. (1999). Longman grammar of spoken and written english. England: Longman.

Παραπομπή Chicago Style

Douglas Biber ... [et al.]. Longman Grammar of Spoken and Written English. England: Longman, 1999.

Παραπομπή MLA

Douglas Biber ... [et al.]. Longman Grammar of Spoken and Written English. England: Longman, 1999.

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