Kaufman, J. (2013). The first 20 hours: How to learn anything ... fast. Portfolio.
Chicago Style (17th ed.) CitationKaufman, Josh. The First 20 Hours: How to Learn Anything ... Fast. New York: Portfolio, 2013.
MLA (8th ed.) CitationKaufman, Josh. The First 20 Hours: How to Learn Anything ... Fast. Portfolio, 2013.
Warning: These citations may not always be 100% accurate.