APA (7th ed.) Citation

Hoffmann, M., Lenhard, J., & Seeger, F. (2005). Activity and sign: Grounding mathematics education. Springer Science+Business Media.

Chicago Style (17th ed.) Citation

Hoffmann, Michael, Johannes Lenhard, and Falk Seeger. Activity and Sign: Grounding Mathematics Education. New York: Springer Science+Business Media, 2005.

MLA (9th ed.) Citation

Hoffmann, Michael, et al. Activity and Sign: Grounding Mathematics Education. Springer Science+Business Media, 2005.