Gaya APA

Allen, D, -, A. (2001). Getting Things Done: The Art of Stress-Free Productivity (Cetakan 1). New York: Penguin Group (USA).

Gaya MLA

Allen, David, -, A. "Getting Things Done: The Art of Stress-Free Productivity". Cetakan 1 New York: Penguin Group (USA), 2001. Text.