Dyfyniad APA

(1971). The problems of persistent chemicals. Paris: Organisation for Economic Co-operation and Development.

Dyfyniad Arddull Chicago

The Problems of Persistent Chemicals. Paris: Organisation for Economic Co-operation and Development, 1971.

Dyfyniad MLA

The Problems of Persistent Chemicals. Paris: Organisation for Economic Co-operation and Development, 1971.

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