(3860647), A. E., (19725373), G. G., (19725376), T. K., (19725379), L. T., (17196733), T. R., & (3335343), M. S. (2017). Ice-core evidence of earliest extensive copper metallurgy in the Andes 2700 years ago.
Chicago Style (17th ed.) Citation(3860647), A. Eichler, G. Gramlich (19725373), T. Kellerhals (19725376), L. Tobler (19725379), Th. Rehren (17196733), and M. Schwikowski (3335343). Ice-core Evidence of Earliest Extensive Copper Metallurgy in the Andes 2700 Years Ago. 2017.
MLA (9th ed.) Citation(3860647), A. Eichler, et al. Ice-core Evidence of Earliest Extensive Copper Metallurgy in the Andes 2700 Years Ago. 2017.
Warning: These citations may not always be 100% accurate.