ALLEN., W. S. Living English Structure: Key to the exercises. Longman.
Chicago Style (17th ed.) CitationALLEN., W. Stannard. Living English Structure: Key to the Exercises. Longman.
MLA (8th ed.) CitationALLEN., W. Stannard. Living English Structure: Key to the Exercises. Longman.
Warning: These citations may not always be 100% accurate.