MLA

Swearingen, Brooke, and Beverly M. K Biller. Cushing's Disease. Springer US, 2011.

APA

Swearingen, B., & Biller, B. M. K. (2011). Cushing's Disease. Springer US.

Chicago

Swearingen, Brooke, and Beverly M. K Biller. Cushing's Disease. : Springer US, 2011.