Biber, D., Conrad, S., & Leech, G. (2002). Longman student grammar of spoken and written english. Longman/Pearson.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBiber, Douglas, Susan Conrad, और Geoffrey Leech. Longman Student Grammar of Spoken and Written English. Harlow: Longman/Pearson, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBiber, Douglas, et al. Longman Student Grammar of Spoken and Written English. Longman/Pearson, 2002.
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