Cite
Freezing/thawing index variations over the circum-Arctic from 1901 to 2015 and the permafrost extent.
MLA
Shi, Yaya, et al. “Freezing/Thawing Index Variations over the Circum-Arctic from 1901 to 2015 and the Permafrost Extent.” Science of the Total Environment, vol. 660, Apr. 2019, pp. 1294–305. EBSCOhost, https://doi.org/10.1016/j.scitotenv.2019.01.121.
APA
Shi, Y., Niu, F., Lin, Z., & Luo, J. (2019). Freezing/thawing index variations over the circum-Arctic from 1901 to 2015 and the permafrost extent. Science of the Total Environment, 660, 1294–1305. https://doi.org/10.1016/j.scitotenv.2019.01.121
Chicago
Shi, Yaya, Fujun Niu, Zhanju Lin, and Jing Luo. 2019. “Freezing/Thawing Index Variations over the Circum-Arctic from 1901 to 2015 and the Permafrost Extent.” Science of the Total Environment 660 (April): 1294–1305. doi:10.1016/j.scitotenv.2019.01.121.