MLA

Thakur, and Manju Kumari Thakur. Hydrogels. Springer Singapore, 2018.

APA

Thakur, T., & Thakur, M. Kumari. (2018). Hydrogels. Springer Singapore.

Chicago

Thakur, and Manju Kumari Thakur. Hydrogels. : Springer Singapore, 2018.