Biber, D., Conrad, S., & Leech, G. (2002). Longman student grammar of spoken and written english. Longman/Pearson.
芝加哥风格引文Biber, Douglas, Susan Conrad, 与 Geoffrey Leech. Longman Student Grammar of Spoken and Written English. Harlow: Longman/Pearson, 2002.
MLA引文Biber, Douglas, et al. Longman Student Grammar of Spoken and Written English. Longman/Pearson, 2002.
警告：这些引文格式不一定是100％准确.