MLA

Berr, Frieder, et al. Early Neoplasias of the Gastrointestinal Tract. Springer US, 2014.

APA

Berr, F., Oyama, T., Ponchon, T., & Yahagi, N. (2014). Early Neoplasias of the Gastrointestinal Tract. Springer US.

Chicago

Berr, Frieder, Tsuneo Oyama, Thierry Ponchon, and Naohisa Yahagi. Early Neoplasias of the Gastrointestinal Tract. : Springer US, 2014.