TRACKING AN ANCIENT KILLER.

MLA

Rogers, Raymond R., and David W. Krause. “Tracking an Ancient Killer.” Scientific American, vol. 296, no. 2, Feb. 2007, pp. 42–51. EBSCOhost, https://doi.org/10.1038/scientificamerican0207-42.

APA

Rogers, R. R., & Krause, D. W. (2007). Tracking an Ancient Killer. Scientific American, 296(2), 42–51. https://doi.org/10.1038/scientificamerican0207-42

Chicago

Rogers, Raymond R., and David W. Krause. 2007. “Tracking an Ancient Killer.” Scientific American 296 (2): 42–51. doi:10.1038/scientificamerican0207-42.