APA način citiranja

Trần Thị Yến Hoa. (2009). An investigation into common errors in using copular verbs made by fist year students. Khoa Anh.

Čikaški stil citiranja

Trần Thị Yến Hoa. An Investigation Into Common Errors in Using Copular Verbs Made By Fist Year Students. Khoa Anh, 2009.

MLA način citiranja

Trần Thị Yến Hoa. An Investigation Into Common Errors in Using Copular Verbs Made By Fist Year Students. Khoa Anh, 2009.