APA (7th ed.) Citation

Babbage, K. J. (2010). The extreme principle: What matters most, what works best. Rowman & Littlefield Education.

Chicago Style (17th ed.) Citation

Babbage, Keen J. The Extreme Principle: What Matters Most, What Works Best. Lanham: Rowman & Littlefield Education, 2010.

MLA (9th ed.) Citation

Babbage, Keen J. The Extreme Principle: What Matters Most, What Works Best. Rowman & Littlefield Education, 2010.