APA引文

(2015). Grammar explorer 1: Student book. Boston: MA National Geographic Learning Cengage Learning.

Trích dẫn kiểu Chicago

Grammar Explorer 1: Student Book. Boston: MA National Geographic Learning Cengage Learning, 2015.

MLA引文

Grammar Explorer 1: Student Book. Boston: MA National Geographic Learning Cengage Learning, 2015.

警告：這些引文格式不一定是100％准確.