Cita APA (7a ed.)
Babbage, K. J. (2010). The extreme principle: What matters most, what works best. Rowman & Littlefield Education.
Cita Chicago Style (17a ed.)
Babbage, Keen J. The Extreme Principle: What Matters Most, What Works Best. Lanham: Rowman & Littlefield Education, 2010.
Cita MLA (9a ed.)
Babbage, Keen J. The Extreme Principle: What Matters Most, What Works Best. Rowman & Littlefield Education, 2010.
Precaución: Estas citas no son 100% exactas.