MLA

Rathgeb, Christian, Andreas Uhl, and Peter Wild. Iris Biometrics. Springer New York, 2013.

APA

Rathgeb, C., Uhl, A., & Wild, P. (2013). Iris Biometrics. Springer New York.

Chicago

Rathgeb, Christian, Andreas Uhl, Peter Wild, and Peter Wild. Iris Biometrics. : Springer New York, 2013.