MLA

Ao, et al. Transactions On Engineering Technologies. Springer Singapore, 2019.

APA

Ao, A., Ao, S., Gelman, L., & Kim, H. (2019). Transactions on Engineering Technologies. Springer Singapore.

Chicago

Ao, Sio-Iong Ao, Len Gelman, and Haeng-kon Kim. Transactions On Engineering Technologies. : Springer Singapore, 2019.