APA引文

Steel, P. (2011). The procrastination equation: How to stop putting things off and start getting stuff done (1st U.S. ed.). Harper.

Chicago Style (17th ed.) Citation

Steel, Piers. The Procrastination Equation: How to Stop Putting Things off and Start Getting Stuff Done. 1st U.S. ed. New York: Harper, 2011.

MLA引文

Steel, Piers. The Procrastination Equation: How to Stop Putting Things off and Start Getting Stuff Done. 1st U.S. ed. Harper, 2011.

警告：這些引文格式不一定是100％准確.