MLA

Gnanagurunathan, Gnanam, K. Usha Kiran, and R. G Sangeetha. Optical And Microwave Technologies. Springer Singapore, 2018.

APA

Gnanagurunathan, G., Kiran, K. Usha, & Sangeetha, R. G. (2018). Optical And Microwave Technologies. Springer Singapore.

Chicago

Gnanagurunathan, Gnanam, K. Usha Kiran, and R. G Sangeetha. Optical And Microwave Technologies. : Springer Singapore, 2018.