Book Review: Wright,D. B.,& London,K. (2009). Modern Regression Techniques Using R: A Practical Guide for Students and Researchers. Thousand Oaks,CA: Sage. 216 pp

Marsh, L.C. , & Cormier, D.R. ( 2001). Splines regression models (Sage University Papers Series on Quantitative Applications in the Social Sciences, No. 07-137). Thousand Oaks, CA: Sage.

Micceri, T. ( 1989). A unicorn, the normal curve, and other improbable creatures . Psychological Bulletin, 105, 156-166.