Mobile Computing, Applications, and Services
  MLA
  Liu, et al. Mobile Computing, Applications, and Services. Springer International Publishing, 2020.
  APA
  Liu, L., Bi, Z., Gao, H., & Yin, Y. (2020). Mobile Computing, Applications, and Services. Springer International Publishing.
  Chicago
  Liu, Zhongqin Bi, Honghao Gao, and Yuyu Yin. Mobile Computing, Applications, and Services. : Springer International Publishing, 2020.