APA引文

Walker, E., & Elsworth, S. (1994). Grammar practice for intermediate students: With answer key. Burnt Mill: Longman.

Trích dẫn kiểu Chicago

Walker, E., và S. Elsworth. Grammar Practice for Intermediate Students: With Answer Key. Burnt Mill: Longman, 1994.

MLA引文

Walker, E., và S. Elsworth. Grammar Practice for Intermediate Students: With Answer Key. Burnt Mill: Longman, 1994.

警告：這些引文格式不一定是100％准確.