RA, S., GL, T., JP, B., & M, S. (1979). Viking bistatic radar observations of the hellas basin on Mars: Preliminary results. Science (New York, N.Y.), 203(4375), 45. https://doi.org/10.1126/science.203.4375.45
Chicago Style (17th ed.) CitationRA, Simpson, Tyler GL, Brenkle JP, and Sue M. "Viking Bistatic Radar Observations of the Hellas Basin on Mars: Preliminary Results." Science (New York, N.Y.) 203, no. 4375 (1979): 45. https://doi.org/10.1126/science.203.4375.45.
MLA (9th ed.) CitationRA, Simpson, et al. "Viking Bistatic Radar Observations of the Hellas Basin on Mars: Preliminary Results." Science (New York, N.Y.), vol. 203, no. 4375, 1979, p. 45, https://doi.org/10.1126/science.203.4375.45.
Warning: These citations may not always be 100% accurate.