APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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