Não informado. (1977). Health and Hygiene. Royal Institute of Public Health and Hygiene.
Citace podle Chicago (17th ed.)Não informado. Health and Hygiene. London: Royal Institute of Public Health and Hygiene, 1977.
Citace podle MLA (8th ed.)Não informado. Health and Hygiene. Royal Institute of Public Health and Hygiene, 1977.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..