Não informado. (1944). Public Health Economics. University of Michigan, School of Public Health.
Chicago-referens (17:e uppl.)Não informado. Public Health Economics. Ann Arbor, Mich: University of Michigan, School of Public Health, 1944.
MLA-referens (8:e uppl.)Não informado. Public Health Economics. University of Michigan, School of Public Health, 1944.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.