APA (7th ed.) Citation

Vanderkam, L. (2010). 168 hours: You have more time than you think. Portfolio.

Chicago Style (17th ed.) Citation

Vanderkam, Laura. 168 Hours: You Have More Time than You Think. New York: Portfolio, 2010.

MLA (8th ed.) Citation

Vanderkam, Laura. 168 Hours: You Have More Time than You Think. Portfolio, 2010.

Warning: These citations may not always be 100% accurate.