Azar, b. s. (1989). Understanding and using english grammar. Prentice Hall Regents.
芝加哥风格引文Azar, betty schrampher. Understanding and Using English Grammar. Prentice Hall Regents, 1989.
MLA引文Azar, betty schrampher. Understanding and Using English Grammar. Prentice Hall Regents, 1989.
警告：这些引文格式不一定是100％准确.