Downing, A. (1992). A university course in English grammar. Redwood.
Trích dẫn kiểu ChicagoDowning, Angela. A University Course in English Grammar. Redwood, 1992.
MLA引文Downing, Angela. A University Course in English Grammar. Redwood, 1992.
警告：这些引文格式不一定是100％准确.