APA aipamena

Covey, S. R. (2011). 3rd alternative solving life's most difficult problems.

Chicago Style aipamena

Covey, Stephen R. 3rd Alternative Solving Life's Most Difficult Problems. Simon & Schuster, 2011.

MLA aipamena

Covey, Stephen R. 3rd Alternative Solving Life's Most Difficult Problems. 2011.