एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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