TG, S., A, E. G., B, W., & M, C. (1999). A post-stishovite SiO2 polymorph in the meteorite Shergotty: Implications for impact events. Science (New York, N.Y.), 284(5419), 1511. https://doi.org/10.1126/science.284.5419.1511
Chicago Style (17th ed.) CitationTG, Sharp, El Goresy A, Wopenka B, and Chen M. "A Post-stishovite SiO2 Polymorph in the Meteorite Shergotty: Implications for Impact Events." Science (New York, N.Y.) 284, no. 5419 (1999): 1511. https://doi.org/10.1126/science.284.5419.1511.
MLA (9th ed.) CitationTG, Sharp, et al. "A Post-stishovite SiO2 Polymorph in the Meteorite Shergotty: Implications for Impact Events." Science (New York, N.Y.), vol. 284, no. 5419, 1999, p. 1511, https://doi.org/10.1126/science.284.5419.1511.
Warning: These citations may not always be 100% accurate.