APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.