MLA

Wu, et al. The Electrical Contact of the Pantograph-catenary System. Springer Singapore, 2019.

APA

Wu, W., Gao, G., Wei, W., & Yang, Z. (2019). The Electrical Contact of the Pantograph-Catenary System. Springer Singapore.

Chicago

Wu, Guoqiang Gao, Wenfu Wei, and Zefeng Yang. The Electrical Contact of the Pantograph-Catenary System. : Springer Singapore, 2019.