International Biographical Centre. International Who's Who of Intellectuals. Intern. Biograph. Centre.
Citazione stile Chigago Style (17a edizione)International Biographical Centre. International Who's Who of Intellectuals. Cambridge: Intern. Biograph. Centre.
Citatione MLA (9a ed.)International Biographical Centre. International Who's Who of Intellectuals. Intern. Biograph. Centre.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.