MLA

Chan, Hing Kai, Chan, and Xiaojun Wang. Fuzzy Hierarchical Model for Risk Assessment. Springer London, 2013.

APA

Chan, H. Kai, Chan, C., & Wang, X. (2013). Fuzzy Hierarchical Model for Risk Assessment. Springer London.

Chicago

Chan, Hing Kai, Chan, and Xiaojun Wang. Fuzzy Hierarchical Model for Risk Assessment. : Springer London, 2013.