APA引文

Langan, J. (2006). English skills (8th ed.). Boston: McGraw-Hill.

Trích dẫn kiểu Chicago

Langan, John. English Skills. 8th ed. Boston: McGraw-Hill, 2006.

MLA引文

Langan, John. English Skills. 8th ed. Boston: McGraw-Hill, 2006.

警告：這些引文格式不一定是100％准確.