MLA

Cornelis, Chris, et al. 35 Years of Fuzzy Set Theory. Springer Berlin Heidelberg, 2011.

APA

Cornelis, C., Deschrijver, G., Nachtegael, M., Schockaert, S., & Shi, Y. (2011). 35 Years of Fuzzy Set Theory. Springer Berlin Heidelberg.

Chicago

Cornelis, Chris, Glad Deschrijver, Mike Nachtegael, Steven Schockaert, and Yun Shi. 35 Years of Fuzzy Set Theory. : Springer Berlin Heidelberg, 2011.