Cita APA (7th ed.)
Allen, D. (2015). Getting Things Done: The Art of Stress-Free Productivity. Piatkus.
Cita Chicago (17th ed.)
Allen, David. Getting Things Done: The Art of Stress-Free Productivity. London: Piatkus, 2015.
Cita MLA (9th ed.)
Allen, David. Getting Things Done: The Art of Stress-Free Productivity. Piatkus, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.