ELKINGTON JOHN. (2008). POWER OF UNREASONABLE PEOPLE. HARVARD BUSINESS SCHOOL PRESS.
Chicago-referens (17:e uppl.)ELKINGTON JOHN. POWER OF UNREASONABLE PEOPLE. BOSTON: HARVARD BUSINESS SCHOOL PRESS, 2008.
MLA-referens (9:e uppl.)ELKINGTON JOHN. POWER OF UNREASONABLE PEOPLE. HARVARD BUSINESS SCHOOL PRESS, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.