MLA

Otake, Mihoko, Oussama Khatib, and Frans Groen. Electroactive Polymer Gel Robots. Springer Berlin Heidelberg, 2010.

APA

Otake, M., Khatib, O., & Groen, F. (2010). Electroactive Polymer Gel Robots. Springer Berlin Heidelberg.

Chicago

Otake, Mihoko, Oussama Khatib, and Frans Groen. Electroactive Polymer Gel Robots. : Springer Berlin Heidelberg, 2010.