APA (7th ed.) Citation
Magretta, J. (2012). Understanding Michael Porter: <the> essential guide to competition and strategy. Harvard Business Review Press.
Chicago Style (17th ed.) Citation
Magretta, Joan. Understanding Michael Porter: <the> Essential Guide to Competition and Strategy. Boston: Harvard Business Review Press, 2012.
MLA (9th ed.) Citation
Magretta, Joan. Understanding Michael Porter: <the> Essential Guide to Competition and Strategy. Harvard Business Review Press, 2012.
Warning: These citations may not always be 100% accurate.