APA引文

Heyderman, E. (2010). Complete PET Student's book with answers. Cambridge University Press.

Trích dẫn kiểu Chicago

Heyderman, Emma. Complete PET Student's Book With Answers. Cambridge University Press, 2010.

MLA引文

Heyderman, Emma. Complete PET Student's Book With Answers. Cambridge University Press, 2010.

警告：這些引文格式不一定是100％准確.