John C. Maxwell Quotes about Focus
John C. Maxwell (2006). “Motivated to Succeed”, p.69, Grupo Nelson
John C. Maxwell (2003). “Thinking for a Change: 11 Ways Highly Successful People Approach Life and Work”, p.50, Hachette UK
John C. Maxwell (2015). “How Successful People Win: Turn Every Setback into a Step Forward”, p.25, Hachette UK
"The 15 Invaluable Laws of Growth". Book by John C. Maxwell, October 2, 2012.