MLA

Saaty, Thomas L, and Luis G Vargas. Models, Methods, Concepts & Applications of the Analytic Hierarchy Process. Dordrecht: Springer US, 2012.

APA

Saaty, T. L, & Vargas, L. G. (2012). Models, Methods, Concepts & Applications of the Analytic Hierarchy Process. Dordrecht: Springer US.

Chicago

Saaty, Thomas L., and Luis G Vargas. Models, Methods, Concepts & Applications of the Analytic Hierarchy Process. Dordrecht: Springer US, 2012.