Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

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