APA (7th ed.) Citation

Asprey, D. (2017). Head strong: The bulletproof plan to boost brainpower, increase focus, and maximize performance—in just two weeks.

Chicago Style (17th ed.) Citation

Asprey, Dave. Head Strong: The Bulletproof Plan to Boost Brainpower, Increase Focus, and Maximize Performance—in Just Two Weeks. 2017.

MLA (8th ed.) Citation

Asprey, Dave. Head Strong: The Bulletproof Plan to Boost Brainpower, Increase Focus, and Maximize Performance—in Just Two Weeks. 2017.

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