Cita APA (7a ed.)

Biber, D., Conrad, S., & Leech, G. (2009). Longman student grammar of spoken and written english. Longman.

Cita Chicago Style (17a ed.)

Biber, Douglas, Susan Conrad, y Geoffrey Leech. Longman Student Grammar of Spoken and Written English. Harlow: Longman, 2009.

Cita MLA (8a ed.)

Biber, Douglas, et al. Longman Student Grammar of Spoken and Written English. Longman, 2009.