MLA

Ruggieri, Pietro, et al. Tumors of the Sacrum. Cham: Springer International Publishing, 2017.

APA

Ruggieri, P., Angelini, A., Picci, P., & Vanel, D. (2017). Tumors of the Sacrum. Cham: Springer International Publishing.

Chicago

Ruggieri, Pietro, Andrea Angelini, Piero Picci, and Daniel Vanel. Tumors of the Sacrum. Cham: Springer International Publishing, 2017.