Dyfyniad APA

(2002). Principles and methods for the assessment of risk from essential trace elements. World Health Organisation.

Dyfyniad Arddull Chicago

Principles and Methods for the Assessment of Risk from Essential Trace Elements. Geneva: World Health Organisation, 2002.

Dyfyniad MLA

Principles and Methods for the Assessment of Risk from Essential Trace Elements. World Health Organisation, 2002.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.