APA ציטוט

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

Trích dẫn kiểu Chicago

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

ציטוט MLA

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