APA (7th ed.) Citation

Utlaut, W. E., & Cohen, R. (1971). Modifying the ionosphere with intense radio waves. Science, 174, 245. https://doi.org/10.1126/science.174.4006.245

Chicago Style (17th ed.) Citation

Utlaut, W. E., and R. Cohen. "Modifying the Ionosphere with Intense Radio Waves." Science 174 (1971): 245. https://doi.org/10.1126/science.174.4006.245.

MLA (9th ed.) Citation

Utlaut, W. E., and R. Cohen. "Modifying the Ionosphere with Intense Radio Waves." Science, vol. 174, 1971, p. 245, https://doi.org/10.1126/science.174.4006.245.