MLA

Nayak, Bhagyalaxmi, and Uma Singh. Gestational Trophoblastic Disease. Springer Singapore, 2021.

APA

Nayak, B., & Singh, U. (2021). Gestational Trophoblastic Disease. Springer Singapore.

Chicago

Nayak, Bhagyalaxmi, and Uma Singh. Gestational Trophoblastic Disease. : Springer Singapore, 2021.