Cita APA (7th ed.)
Blankley, T. (2009). American grit: What it will take to survive and win in the 21st century. Regnery Pub. Inc..
Cita Chicago (17th ed.)
Blankley, Tony. American Grit: What It Will Take to Survive and Win in the 21st Century. Washington, D.C.: Regnery Pub. Inc., 2009.
Cita MLA (9th ed.)
Blankley, Tony. American Grit: What It Will Take to Survive and Win in the 21st Century. Regnery Pub. Inc., 2009.
Atenció: Aquestes cites poden no estar 100% correctes.