(1991). Collins Cobuild sudent's grammar: Self-study edition with answer key. London: HarperCollins Publishers.
Chicago Style CitationCollins Cobuild Sudent's Grammar: Self-study Edition With Answer Key. London: HarperCollins Publishers, 1991.
MLA CitationCollins Cobuild Sudent's Grammar: Self-study Edition With Answer Key. London: HarperCollins Publishers, 1991.
Warning: These citations may not always be 100% accurate.