John Langan. (2004). Sentence skills, form B. A workbook for writers.
Trích dẫn kiểu ChicagoJohn Langan. Sentence Skills, Form B. A Workbook for Writers. 2004.
MLA引文John Langan. Sentence Skills, Form B. A Workbook for Writers. 2004.
警告：这些引文格式不一定是100％准确.