APA (7th ed.) Citation

Allen, D. (2015). Getting things done: The art of stress-free productivity.

Chicago Style (17th ed.) Citation

Allen, David. Getting Things Done: The Art of Stress-free Productivity. 2015.

MLA (8th ed.) Citation

Allen, David. Getting Things Done: The Art of Stress-free Productivity. 2015.

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