APA (7th ed.) Citation

Stefan, V., Cohen, B. I., & Joshi, C. (1989). Nonlinear mixing of electromagnetic waves in plasmas. Science, 243, 494. https://doi.org/10.1126/science.243.4890.494

Chicago Style (17th ed.) Citation

Stefan, V., B. I. Cohen, and C. Joshi. "Nonlinear Mixing of Electromagnetic Waves in Plasmas." Science 243 (1989): 494. https://doi.org/10.1126/science.243.4890.494.

MLA (9th ed.) Citation

Stefan, V., et al. "Nonlinear Mixing of Electromagnetic Waves in Plasmas." Science, vol. 243, 1989, p. 494, https://doi.org/10.1126/science.243.4890.494.