MLA

Allbeck, Jan, et al. Intelligent Virtual Agents. Springer Berlin Heidelberg, 2010.

APA

Allbeck, J., Badler, N., Bickmore, T., Kanade, T., Pelachaud, C., & Safonova, A. (2010). Intelligent Virtual Agents. Springer Berlin Heidelberg.

Chicago

Allbeck, Jan, Norman Badler, Timothy Bickmore, Takeo Kanade, Catherine Pelachaud, and Alla Safonova. Intelligent Virtual Agents. : Springer Berlin Heidelberg, 2010.