Allen, D. (2015). Getting Things Done The art of Stress Free Productivity. Piatkus.
Čikaški stil citiranja (17. izdanje)Allen, David. Getting Things Done The Art of Stress Free Productivity. London: Piatkus, 2015.
MLA način citiranja (9. izdanje)Allen, David. Getting Things Done The Art of Stress Free Productivity. Piatkus, 2015.
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