Allen, D. (2015). Getting Things Done The art of Stress Free Productivity. Piatkus.
Style de citation Chicago (17e éd.)Allen, David. Getting Things Done The Art of Stress Free Productivity. London: Piatkus, 2015.
Style de citation MLA (9e éd.)Allen, David. Getting Things Done The Art of Stress Free Productivity. Piatkus, 2015.
Attention : ces citations peuvent ne pas être correctes à 100%.