Allen, D. (2015). Getting Things Done The art of Stress Free Productivity. Piatkus.
Chicago Style (17th ed.) CitationAllen, David. Getting Things Done The Art of Stress Free Productivity. London: Piatkus, 2015.
MLA (9th ed.) CitationAllen, David. Getting Things Done The Art of Stress Free Productivity. Piatkus, 2015.
Warning: These citations may not always be 100% accurate.