MLA

Ballas, R. G, et al. Piezoelectric Multilayer Beam Bending Actuators. Springer Berlin Heidelberg, 2007.

APA

Ballas, R. G, Ballas, R., Fujita, H., Liepmann, D.Ballas, R. G. (2007). Piezoelectric Multilayer Beam Bending Actuators. Springer Berlin Heidelberg.

Chicago

Ballas, R. G., RĂ¼diger Ballas, Hiroyuki Fujita, Dorian Liepmann, and RĂ¼diger G Ballas. Piezoelectric Multilayer Beam Bending Actuators. : Springer Berlin Heidelberg, 2007.