Cita APA (7a ed.)

Knight, B., & Hammel, B. (2013). The power of negative thinking: An unconventional approach to achieving positive results. New Harvest.

Cita Chicago Style (17a ed.)

Knight, Bobby, y Bob Hammel. The Power of Negative Thinking: An Unconventional Approach to Achieving Positive Results. Boston: New Harvest, 2013.

Cita MLA (8a ed.)

Knight, Bobby, y Bob Hammel. The Power of Negative Thinking: An Unconventional Approach to Achieving Positive Results. New Harvest, 2013.

Precaución: Estas citas no son 100% exactas.