MLA

Fang, Yong, et al. Fuzzy Portfolio Optimization. Springer Berlin Heidelberg, 2008.

APA

Fang, Y., Beckmann, M., Künzi, H., Lai, K. Keung, & Wang, S. (2008). Fuzzy Portfolio Optimization. Springer Berlin Heidelberg.

Chicago

Fang, Yong, M Beckmann, H.P Künzi, Kin Keung Lai, and Shouyang Wang. Fuzzy Portfolio Optimization. : Springer Berlin Heidelberg, 2008.