Allen, W. S. (1980). Living English structure: A practice book for foreign students (5th ed., repr.). Longman.
Cita Chicago Style (17a ed.)Allen, W. Stannard. Living English Structure: A Practice Book for Foreign Students. 5th ed., repr. London: Longman, 1980.
Cita MLA (9a ed.)Allen, W. Stannard. Living English Structure: A Practice Book for Foreign Students. 5th ed., repr. Longman, 1980.
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