APA (7th ed.) Citation

Friend, G., & Zehle, S. (2009). Guide to business planning / Graham Friend and Stefan Zehle ([Second edition].). The Economist.

Chicago Style (17th ed.) Citation

Friend, Graham, and Stefan Zehle. Guide to Business Planning / Graham Friend and Stefan Zehle. [Second edition]. [London]: The Economist, 2009.

MLA (9th ed.) Citation

Friend, Graham, and Stefan Zehle. Guide to Business Planning / Graham Friend and Stefan Zehle. [Second edition]. The Economist, 2009.

Warning: These citations may not always be 100% accurate.