ALTER, J. (1991). Essential english usage and grammar 3. Binarupa Aksara.
芝加哥风格引文ALTER, J.B. Essential English Usage and Grammar 3. Jakarta: Binarupa Aksara, 1991.
MLA引文ALTER, J.B. Essential English Usage and Grammar 3. Binarupa Aksara, 1991.
警告：这些引文格式不一定是100％准确.