APA (7th ed.) Citation

Frederick, J. E., & Snell, H. E. (1988). Ultraviolet radiation levels during the Antarctic spring.

Chicago Style (17th ed.) Citation

Frederick, John E., and Hilary E. Snell. Ultraviolet Radiation Levels During the Antarctic Spring. 1988.

MLA (9th ed.) Citation

Frederick, John E., and Hilary E. Snell. Ultraviolet Radiation Levels During the Antarctic Spring. 1988.

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