Não informado. (1953). Official Documents. Pan American Health Organization.
Chicagoスタイル(17版)引用形式Não informado. Official Documents. Washington: Pan American Health Organization, 1953.
MLA(8版)引用形式Não informado. Official Documents. Pan American Health Organization, 1953.
警告: この引用は必ずしも正確ではありません.