Activity and Sign

MLA

Hoffmann, Michael H.G.; Lenhard, Johannes; Seeger, Falk, et al. Activity and Sign. Springer US, 2005.

APA

Hoffmann, F., Hoffmann, M. H. G, Lenhard, J., & Seeger, F. (2005). Activity and Sign. Springer US.

Chicago

Hoffmann, Michael H.G.; Lenhard, Johannes; Seeger, Falk, Michael H. G Hoffmann, Johannes Lenhard, and Falk Seeger. Activity and Sign. : Springer US, 2005.