Dyfyniad APA

World Health Organization, Geneva. (2000). Concise international chemical assessment document 24: Crystalline silica, quartz. World Health Organization.

Dyfyniad Arddull Chicago

World Health Organization, Geneva. Concise International Chemical Assessment Document 24: Crystalline Silica, Quartz. Geneva: World Health Organization, 2000.

Dyfyniad MLA

World Health Organization, Geneva. Concise International Chemical Assessment Document 24: Crystalline Silica, Quartz. World Health Organization, 2000.

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