Cita APA (7a ed.)

Kaufman, J. (2013). The first 20 hours: How to learn anything ... fast. Portfolio/Penguin.

Cita Chicago Style (17a ed.)

Kaufman, Josh. The First 20 Hours: How to Learn Anything ... Fast. New York: Portfolio/Penguin, 2013.

Cita MLA (8a ed.)

Kaufman, Josh. The First 20 Hours: How to Learn Anything ... Fast. Portfolio/Penguin, 2013.

Precaución: Estas citas no son 100% exactas.