APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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