Differences Quotes - Page 120
Nelson Mandela (2011). “Nelson Mandela By Himself: The Authorised Book of Quotations”, p.218, Pan Macmillan
Morrie Schwartz (2011). “Morrie In His Own Words: Life Wisdom From a Remarkable Man”, p.14, Pan Macmillan
Mihaly Csikszentmihalyi (2009). “Creativity: Flow and the Psychology of Discovery and”, p.31, Harper Collins