APA (7th ed.) Citation

Proffitt, M. H., Powell, J. A., Tuck, A. F., Fahey, D. W., Kelly, K. K., Krueger, A. J., . . . Chan, K. R. (1989). A chemical definition of the boundary of the Antarctic ozone hole.

Chicago Style (17th ed.) Citation

Proffitt, M. H., et al. A Chemical Definition of the Boundary of the Antarctic Ozone Hole. 1989.

MLA (9th ed.) Citation

Proffitt, M. H., et al. A Chemical Definition of the Boundary of the Antarctic Ozone Hole. 1989.

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