MLA

Hallek, Daniel Catovsky, and Barbara Eichhorst. Chronic Lymphocytic Leukemia. Springer International Publishing, 2019.

APA

Hallek, H., Catovsky, D., & Eichhorst, B. (2019). Chronic Lymphocytic Leukemia. Springer International Publishing.

Chicago

Hallek, Daniel Catovsky, and Barbara Eichhorst. Chronic Lymphocytic Leukemia. : Springer International Publishing, 2019.