MLA

Nagaratnam, Gary Cheuk, and Kujan Nagaratnam. Advanced Age Geriatric Care. Springer International Publishing, 2019.

APA

Nagaratnam, N., Cheuk, G., & Nagaratnam, K. (2019). Advanced Age Geriatric Care. Springer International Publishing.

Chicago

Nagaratnam, Gary Cheuk, and Kujan Nagaratnam. Advanced Age Geriatric Care. : Springer International Publishing, 2019.