APA (7th ed.) Citation

(1987). The Ozone Layer. UNEP/GEMS Environment Library No. 2.

Chicago Style (17th ed.) Citation

The Ozone Layer. UNEP/GEMS Environment Library No. 2. 1987.

MLA (9th ed.) Citation

The Ozone Layer. UNEP/GEMS Environment Library No. 2. 1987.

Warning: These citations may not always be 100% accurate.