Audrey L. Wright. (1960). Practice your enghish (In lần thứ 1.). New York: American book company.
Παραπομπή Chicago StyleAudrey L. Wright. Practice Your Enghish. In lần thứ 1. New York: American book company, 1960.
Παραπομπή MLAAudrey L. Wright. Practice Your Enghish. In lần thứ 1. New York: American book company, 1960.
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