Samelson, W. (1974). English as a second language. Reston Pub. Co.
芝加哥风格引文Samelson, William. English as a Second Language. Reston, Va.: Reston Pub. Co, 1974.
MLA引文Samelson, William. English as a Second Language. Reston Pub. Co, 1974.
警告：这些引文格式不一定是100％准确.