APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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