APA (7th ed.) Citation

LG, M., RF, B., RE, D., & GH, C. (1981). Calibration of the beginning of the age of mammals in patagonia. Science (New York, N.Y.), 212(4490), 43. https://doi.org/10.1126/science.212.4490.43

Chicago Style (17th ed.) Citation

LG, Marshall, Butler RF, Drake RE, and Curtis GH. "Calibration of the Beginning of the Age of Mammals in Patagonia." Science (New York, N.Y.) 212, no. 4490 (1981): 43. https://doi.org/10.1126/science.212.4490.43.

MLA (9th ed.) Citation

LG, Marshall, et al. "Calibration of the Beginning of the Age of Mammals in Patagonia." Science (New York, N.Y.), vol. 212, no. 4490, 1981, p. 43, https://doi.org/10.1126/science.212.4490.43.