American Biographical Institute. (2003). Great minds of the 21st century. American Biographical Institute.
Chicago-referens (17:e uppl.)American Biographical Institute. Great Minds of the 21st Century. Raleigh, N.C: American Biographical Institute, 2003.
MLA-referens (9:e uppl.)American Biographical Institute. Great Minds of the 21st Century. American Biographical Institute, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.