Barton, L., Sardinas, C. D., Boyd, F., & Numrich, C. (2009). NorthStar 3: Reading and writing (3rd ed.). Longman.
芝加哥风格引文Barton, Laurie, Carolyn DuPaquier Sardinas, Frances Boyd, 与 Carol Numrich. NorthStar 3: Reading and Writing. 3rd ed. White Plains, NY: Longman, 2009.
MLA引文Barton, Laurie, et al. NorthStar 3: Reading and Writing. 3rd ed. Longman, 2009.
警告：这些引文格式不一定是100％准确.