Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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