Rach, R. (1996). Easy German exercises: Practice for beginners. Passport Books.
芝加哥风格引文Rach, Ruth. Easy German Exercises: Practice for Beginners. Lincolnwood, Ill: Passport Books, 1996.
MLA引文Rach, Ruth. Easy German Exercises: Practice for Beginners. Passport Books, 1996.
警告：这些引文格式不一定是100％准确.