APA引文

Eckstut, S., & Samuela Eckstut. (2006). Focus on grammar. White Plains, NY: Pearson Education.

Trích dẫn kiểu Chicago

Eckstut, Samuela, và Samuela Eckstut. Focus On Grammar. White Plains, NY: Pearson Education, 2006.

MLA引文

Eckstut, Samuela, và Samuela Eckstut. Focus On Grammar. White Plains, NY: Pearson Education, 2006.

警告：這些引文格式不一定是100％准確.