World Health Organization, et al. 1991. Barium: Health and safety guide. Geneva: World Health Organization.
Citace podle APA (7th ed.)World Health Organization, United Nations Environment Programme, International Labour Organisation, & International Programme on Chemical Safety. (1991). Barium: Health and safety guide. World Health Organization.
Citace podle Chicago (17th ed.)World Health Organization, United Nations Environment Programme, International Labour Organisation, a International Programme on Chemical Safety. Barium: Health and Safety Guide. Geneva: World Health Organization, 1991.
Citace podle MLA (9th ed.)World Health Organization, et al. Barium: Health and Safety Guide. World Health Organization, 1991.
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