APA (7th ed.) Citation

Hamill, P., & Toon, O. B. (1991). Polar stratospheric clouds and the ozone hole.

Chicago Style (17th ed.) Citation

Hamill, Patrick, and Owen B. Toon. Polar Stratospheric Clouds and the Ozone Hole. 1991.

MLA (9th ed.) Citation

Hamill, Patrick, and Owen B. Toon. Polar Stratospheric Clouds and the Ozone Hole. 1991.

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