MLA

Liang, et al. Communications, Signal Processing, and Systems. Springer Singapore, 2020.

APA

Liang, L., Liu, X., Mu, J., Wang, W., & Zhang, B. (2020). Communications, Signal Processing, and Systems. Springer Singapore.

Chicago

Liang, Xin Liu, Jiasong Mu, Wei Wang, and Baoju Zhang. Communications, Signal Processing, and Systems. : Springer Singapore, 2020.