APA (7th ed.) Citation

United Nations Environment Programme, International Labour Organisation, & World Health Organization. (1989). Mercury - Environmental aspects. World Health Organization.

Chicago Style (17th ed.) Citation

United Nations Environment Programme, International Labour Organisation, and World Health Organization. Mercury - Environmental Aspects. Geneva: World Health Organization, 1989.

MLA (9th ed.) Citation

United Nations Environment Programme, et al. Mercury - Environmental Aspects. World Health Organization, 1989.