MLA

Everitt, Brian Sidney, et al. An R and S-plus® Companion to Multivariate Analysis. Springer London, 2005.

APA

Everitt, B. Sidney, Casella, G., Everitt, B. S, Fienberg, S., & Olkin, I. (2005). An R and S-PLUS® Companion to Multivariate Analysis. Springer London.

Chicago

Everitt, Brian Sidney, George Casella, Brian S Everitt, Stephen Fienberg, and Ingram Olkin. An R and S-PLUS® Companion to Multivariate Analysis. : Springer London, 2005.