Não informado. (1930). National Institute of Health bulletin. U.S. Public Health Service.
Style de citation Chicago (17e éd.)Não informado. National Institute of Health Bulletin. Washington: U.S. Public Health Service, 1930.
Style de citation MLA (8e éd.)Não informado. National Institute of Health Bulletin. U.S. Public Health Service, 1930.
Attention : ces citations peuvent ne pas être correctes à 100%.