Greenbaum, S. (1991). An introduction to english grammar. Longman.
Chicago Style (17th ed.) CitationGreenbaum, Sidney. An Introduction to English Grammar. Harlow: Longman, 1991.
MLA (8th ed.) CitationGreenbaum, Sidney. An Introduction to English Grammar. Longman, 1991.
Warning: These citations may not always be 100% accurate.