MLA

Ghilardi, Silvio, et al. Frontiers of Combining Systems. Springer Berlin Heidelberg, 2009.

APA

Ghilardi, S., Kanade, T., Sebastiani, R., & Kittler, J. (2009). Frontiers of Combining Systems. Springer Berlin Heidelberg.

Chicago

Ghilardi, Silvio, Takeo Kanade, Roberto Sebastiani, and Josef Kittler. Frontiers of Combining Systems. : Springer Berlin Heidelberg, 2009.