Arroyo, S. R. (1987). English for college freshmen. Rex Book Store.
芝加哥风格引文Arroyo, Sandra Rodriguez. English for College Freshmen. Manila: Rex Book Store, 1987.
MLA引文Arroyo, Sandra Rodriguez. English for College Freshmen. Rex Book Store, 1987.
警告：这些引文格式不一定是100％准确.