Gowers, E., & Greenbaum, S. (1987). The complete plain words ([New ed.].). Penguin Books.
Chicago Style (17th ed.) CitationGowers, Ernest, and Sidney Greenbaum. The Complete Plain Words. [New ed.]. Harmondsworth: Penguin Books, 1987.
MLA (8th ed.) CitationGowers, Ernest, and Sidney Greenbaum. The Complete Plain Words. [New ed.]. Penguin Books, 1987.
Warning: These citations may not always be 100% accurate.