Cita APA (7a ed.)

Allen, D. (2015). Getting Things Done The art of Stress Free Productivity. Piatkus.

Cita Chicago Style (17a ed.)

Allen, David. Getting Things Done The Art of Stress Free Productivity. London: Piatkus, 2015.

Cita MLA (9a ed.)

Allen, David. Getting Things Done The Art of Stress Free Productivity. Piatkus, 2015.