APA (7th ed.) Citation

Allen, D. (2015). Getting Things Done: The Art of Stress-Free Productivity (Revised Edition.). Penguin Books.

Chicago Style (17th ed.) Citation

Allen, David. Getting Things Done: The Art of Stress-Free Productivity. Revised Edition. New York City: Penguin Books, 2015.

MLA (8th ed.) Citation

Allen, David. Getting Things Done: The Art of Stress-Free Productivity. Revised Edition. Penguin Books, 2015.