L G Alexander. (1992). Longman English grammar. London: Longman.
Trích dẫn kiểu ChicagoL G Alexander. Longman English Grammar. London: Longman, 1992.
MLA引文L G Alexander. Longman English Grammar. London: Longman, 1992.
警告：这些引文格式不一定是100％准确.
APA引文