Não informado. (1921). American Journal of Hygiene. John Hopkins University, School of Hygiene and Public Health.
Citace podle Chicago (17th ed.)Não informado. American Journal of Hygiene. Baltimore, Md: John Hopkins University, School of Hygiene and Public Health, 1921.
Citace podle MLA (8th ed.)Não informado. American Journal of Hygiene. John Hopkins University, School of Hygiene and Public Health, 1921.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..