Cita APA (7a ed.)

Xu, K., Wang, X., Liang, P., An, H., Sun, H., Han, W., & Li, Q. (2017). Tree-ring widths are good proxies of annual variation in forest productivity in temperate forests. Nature Portfolio.

Cita Chicago Style (17a ed.)

Xu, Kai, Xiangping Wang, Penghong Liang, Hailong An, Han Sun, Wei Han, y Qiaoyan Li. Tree-ring Widths Are Good Proxies of Annual Variation in Forest Productivity in Temperate Forests. Nature Portfolio, 2017.

Cita MLA (8a ed.)

Xu, Kai, et al. Tree-ring Widths Are Good Proxies of Annual Variation in Forest Productivity in Temperate Forests. Nature Portfolio, 2017.