Biber, D., Conrad, S., & Leech, G. N. (2002). Longman student grammar of spoken and written English. Longman.
Chicago Style (17th ed.) CitationBiber, Douglas, Susan Conrad, and Geoffrey N. Leech. Longman Student Grammar of Spoken and Written English. Harlow: Longman, 2002.
MLA (9th ed.) CitationBiber, Douglas, et al. Longman Student Grammar of Spoken and Written English. Longman, 2002.