APA (7th ed.) Citation

Oltmans, S., Lefohn, A., Scheel, H., Harris, J., Levy II, H., Galbally, I., . . . Mohnen, V. (1998). Trends of ozone in the troposphere. Geophysical Research Letters, 25(2), 139.

Chicago Style (17th ed.) Citation

Oltmans, S.J, et al. "Trends of Ozone in the Troposphere." Geophysical Research Letters 25, no. 2 (1998): 139.

MLA (8th ed.) Citation

Oltmans, S.J, et al. "Trends of Ozone in the Troposphere." Geophysical Research Letters, vol. 25, no. 2, 1998, p. 139.