APA način citiranja

Doãn Hải Quỳnh. (2011). An investigation into grammatical errors in speaking performance of 10th grade student’s at Phan Chau Trinh hinh school.

Čikaški stil citiranja

Doãn Hải Quỳnh. An Investigation Into Grammatical Errors in Speaking Performance of 10th Grade Student’s At Phan Chau Trinh Hinh School. 2011.

MLA način citiranja

Doãn Hải Quỳnh. An Investigation Into Grammatical Errors in Speaking Performance of 10th Grade Student’s At Phan Chau Trinh Hinh School. 2011.