Παραπομπή APA

Biber, D., Conrad, S., & Leech, G. (2010). Longman student grammar of spoken and written English. Pearson.

Παραπομπή Chicago Style

Biber, Douglas, Susan Conrad, και Geoffrey Leech. Longman Student Grammar of Spoken and Written English. Noida: Pearson, 2010.

Παραπομπή MLA

Biber, Douglas, et al. Longman Student Grammar of Spoken and Written English. Pearson, 2010.