Cita APA

Biber, D., Conrad, S., & Leech, G. N. (2002). Longman student grammar of spoken and written English. Pearson Education Limited.

Citación estilo Chicago

Biber, Douglas, Susan Conrad, and Geoffrey N. Leech. Longman Student Grammar of Spoken and Written English. Londres: Pearson Education Limited, 2002.

Cita MLA

Biber, Douglas, et al. Longman Student Grammar of Spoken and Written English. Pearson Education Limited, 2002.