International Biographical Centre & Kay, E. (1981). International who's who in education (Second edition.). International Biographical Centre.
Citazione stile Chigago Style (17a edizione)International Biographical Centre e Ernest Kay. International Who's Who in Education. Second edition. Cambridge: International Biographical Centre, 1981.
Citatione MLA (9a ed.)International Biographical Centre e Ernest Kay. International Who's Who in Education. Second edition. International Biographical Centre, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.