APA (7th ed.) Citation

Leu, M., Chu, L., & Keyser, L. (2004). Heterogeneous Chemistry Important in the Polar Stratosphere.

Chicago Style (17th ed.) Citation

Leu, M-T, L. Chu, and L. Keyser. Heterogeneous Chemistry Important in the Polar Stratosphere. 2004.

MLA (9th ed.) Citation

Leu, M-T, et al. Heterogeneous Chemistry Important in the Polar Stratosphere. 2004.