Cita APA (7a ed.)

Wolff, J. (2010). Focus: Use the power of targeted thinking to get more done (2nd ed.). Prentice Hall Business.

Cita Chicago Style (17a ed.)

Wolff, Jurgen. Focus: Use the Power of Targeted Thinking to Get More Done. 2nd ed. Harlow, England: Prentice Hall Business, 2010.

Cita MLA (9a ed.)

Wolff, Jurgen. Focus: Use the Power of Targeted Thinking to Get More Done. 2nd ed. Prentice Hall Business, 2010.