APA (7th ed.) Citation

Kärcher, B., Burkhardt, U., Unterstrasser, S., & Minnis, P. (2009). Factors controlling contrail cirrus optical depth. Atmospheric Chemistry & Physics, 9(16), 6229.

Chicago Style (17th ed.) Citation

Kärcher, B., U. Burkhardt, S. Unterstrasser, and P. Minnis. "Factors Controlling Contrail Cirrus Optical Depth." Atmospheric Chemistry & Physics 9, no. 16 (2009): 6229.

MLA (9th ed.) Citation

Kärcher, B., et al. "Factors Controlling Contrail Cirrus Optical Depth." Atmospheric Chemistry & Physics, vol. 9, no. 16, 2009, p. 6229.