MLA

Metcalfe, George, et al. Proof Theory for Fuzzy Logics. Springer Netherlands, 2009.

APA

Metcalfe, G., Barwise, J., Gabbay, D. M, & Olivetti, N. (2009). Proof Theory for Fuzzy Logics. Springer Netherlands.

Chicago

Metcalfe, George, Jon Barwise, Dov M Gabbay, and Nicola Olivetti. Proof Theory for Fuzzy Logics. : Springer Netherlands, 2009.