Dyfyniad APA

(1991). Selected multilateral treaties in the field of the environment: ( Volume 2 ). UNEP.

Dyfyniad Arddull Chicago

Selected Multilateral Treaties in the Field of the Environment: ( Volume 2 ). Nairobi: UNEP, 1991.

Dyfyniad MLA

Selected Multilateral Treaties in the Field of the Environment: ( Volume 2 ). UNEP, 1991.

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