MLA

Hekal, et al. Compact Size Wireless Power Transfer Using Defected Ground Structures. Springer Singapore, 2019.

APA

Hekal, H., Abdel-Rahman, A. B, Allam, A., & Pokharel, R. K. (2019). Compact Size Wireless Power Transfer Using Defected Ground Structures. Springer Singapore.

Chicago

Hekal, Adel B Abdel-Rahman, Ahmed Allam, and Ramesh K Pokharel. Compact Size Wireless Power Transfer Using Defected Ground Structures. : Springer Singapore, 2019.