MLA

Zhang, Hongliang, et al. Reconfigurable Intelligent Surface-empowered 6g. Springer International Publishing, 2021.

APA

Zhang, H., Di, B., Han, Z., & Song, L. (2021). Reconfigurable Intelligent Surface-Empowered 6G. Springer International Publishing.

Chicago

Zhang, Hongliang, Boya Di, Zhu Han, and Lingyang Song. Reconfigurable Intelligent Surface-Empowered 6G. : Springer International Publishing, 2021.