APA (7th ed.) Citation

Steel, P. (2012). The procrastination equation: How to stop putting things off and start getting stuff done (1st Harper pbk.). Harper.

Chicago Style (17th ed.) Citation

Steel, Piers. The Procrastination Equation: How to Stop Putting Things off and Start Getting Stuff Done. 1st Harper pbk. New York: Harper, 2012.

MLA (9th ed.) Citation

Steel, Piers. The Procrastination Equation: How to Stop Putting Things off and Start Getting Stuff Done. 1st Harper pbk. Harper, 2012.