APA引文

Schoenberg, I., & Irene Schoenberg. (2006). Focus on grammar: An integrated skills approach. New York, NY: Pearson/Longman.

Trích dẫn kiểu Chicago

Schoenberg, Irene, và Irene Schoenberg. Focus On Grammar: An Integrated Skills Approach. New York, NY: Pearson/Longman, 2006.

MLA引文

Schoenberg, Irene, và Irene Schoenberg. Focus On Grammar: An Integrated Skills Approach. New York, NY: Pearson/Longman, 2006.

警告：這些引文格式不一定是100％准確.