Cita APA (7th ed.)

Covey, S. R. (2012). The 3rd alternative: Solving life's most difficult problems. Simon & Schuster UK.

Cita Chicago (17th ed.)

Covey, Stephen R. The 3rd Alternative: Solving Life's Most Difficult Problems. London: Simon & Schuster UK, 2012.

Cita MLA (9th ed.)

Covey, Stephen R. The 3rd Alternative: Solving Life's Most Difficult Problems. Simon & Schuster UK, 2012.

Atenció: Aquestes cites poden no estar 100% correctes.