Elaine Walker. (1994). Grammar practice for elementary students with answer key. London: Longman.
استشهاد بنمط شيكاغوElaine Walker. Grammar Practice for Elementary Students With Answer Key. London: Longman, 1994.
MLA استشهادElaine Walker. Grammar Practice for Elementary Students With Answer Key. London: Longman, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.