Steel, P. (2012). The procrastination equation: How to stop putting things off and start getting things done. Pearson.
Style de citation Chicago (17e éd.)Steel, Piers. The Procrastination Equation: How to Stop Putting Things off and Start Getting Things Done. New York: Pearson, 2012.
Style de citation MLA (8e éd.)Steel, Piers. The Procrastination Equation: How to Stop Putting Things off and Start Getting Things Done. Pearson, 2012.
Attention : ces citations peuvent ne pas être correctes à 100%.