APA (7th ed.) Citation

ebrary, Inc, & Economist Books. (2005). Style guide ([9th ed.].). Profile Books.

Chicago Style (17th ed.) Citation

ebrary, Inc, and Economist Books. Style Guide. [9th ed.]. London: Profile Books, 2005.

MLA (9th ed.) Citation

ebrary, Inc, and Economist Books. Style Guide. [9th ed.]. Profile Books, 2005.