Cita APA (7a ed.)

Friend, G., & Zehle, S. (2004). Guide to business planning. The economist in association with Profile Books.

Cita Chicago Style (17a ed.)

Friend, Graham, y Stefan Zehle. Guide to Business Planning. London: The economist in association with Profile Books, 2004.

Cita MLA (9a ed.)

Friend, Graham, y Stefan Zehle. Guide to Business Planning. The economist in association with Profile Books, 2004.