APA引文

Langan, J. (2006). English skills (5th ed.). McGraw-Hill.

芝加哥风格引文

Langan, John. English Skills. 5th ed. New York: McGraw-Hill, 2006.

MLA引文

Langan, John. English Skills. 5th ed. McGraw-Hill, 2006.

警告:这些引文格式不一定是100%准确.