Παραπομπή APA

Elaine Walker. (1994). Grammar practice for elementary students with answer key. London: Longman.

Παραπομπή Chicago Style

Elaine Walker. Grammar Practice for Elementary Students With Answer Key. London: Longman, 1994.

Παραπομπή MLA

Elaine Walker. Grammar Practice for Elementary Students With Answer Key. London: Longman, 1994.

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