Stephenson, H. (2024). Life A2- B1: Student's book. National geographic learning.
Trích dẫn kiểu ChicagoStephenson, Helen. Life A2- B1: Student's Book. National geographic learning, 2024.
MLA引文Stephenson, Helen. Life A2- B1: Student's Book. National geographic learning, 2024.
警告：這些引文格式不一定是100％准確.