Não informado. (1881). Public health bulletin. U.S. Public Health Service.
Chicagoスタイル(17版)引用形式Não informado. Public Health Bulletin. Washington: U.S. Public Health Service, 1881.
MLA(8版)引用形式Não informado. Public Health Bulletin. U.S. Public Health Service, 1881.
警告: この引用は必ずしも正確ではありません.