Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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