Ling, J., & Smith, A. (2001). English: Workbook. Federal Publications.
芝加哥风格引文Ling, Judy, 与 Anne Smith. English: Workbook. Singapore: Federal Publications, 2001.
MLA引文Ling, Judy, 与 Anne Smith. English: Workbook. Federal Publications, 2001.
警告：这些引文格式不一定是100％准确.