MLA

Scherer, Bernd Michael, R. Douglas Martin, and Bernd Scherer. Introduction to Modern Portfolio Optimization with Nuopt and S-plus. Springer New York, 2005.

APA

Scherer, B. Michael, Martin, R. Douglas, & Scherer, B. (2005). Introduction to Modern Portfolio optimization with NUOPT and S-PLUS. Springer New York.

Chicago

Scherer, Bernd Michael, R. Douglas Martin, and Bernd Scherer. Introduction to Modern Portfolio Optimization with NUOPT and S-PLUS. : Springer New York, 2005.