APA (7th ed.) Citation

PE, G., DH, R., & BF, B. (1980). The double quasar 0957+561: Examination of the gravitational lens hypothesis using the very large array. Science (New York, N.Y.), 208(4443), 495. https://doi.org/10.1126/science.208.4443.495

Chicago Style (17th ed.) Citation

PE, Greenfield, Roberts DH, and Burke BF. "The Double Quasar 0957+561: Examination of the Gravitational Lens Hypothesis Using the Very Large Array." Science (New York, N.Y.) 208, no. 4443 (1980): 495. https://doi.org/10.1126/science.208.4443.495.

MLA (9th ed.) Citation

PE, Greenfield, et al. "The Double Quasar 0957+561: Examination of the Gravitational Lens Hypothesis Using the Very Large Array." Science (New York, N.Y.), vol. 208, no. 4443, 1980, p. 495, https://doi.org/10.1126/science.208.4443.495.