APA ציטוט

Walker, E., & Elsworth, S. (2000). Grammar practice for upper intermediate students. England: Longman.

Trích dẫn kiểu Chicago

Walker, Elaine., và Steve Elsworth. Grammar Practice for Upper Intermediate Students. England: Longman, 2000.

ציטוט MLA

Walker, Elaine., và Steve Elsworth. Grammar Practice for Upper Intermediate Students. England: Longman, 2000.