Não informado. (1977). Health and Hygiene. Royal Institute of Public Health and Hygiene.
Chicagoスタイル(17版)引用形式Não informado. Health and Hygiene. London: Royal Institute of Public Health and Hygiene, 1977.
MLA(8版)引用形式Não informado. Health and Hygiene. Royal Institute of Public Health and Hygiene, 1977.
警告: この引用は必ずしも正確ではありません.