MLA

Bill Worzel, Terence Soule, Rick Riolo, et al. Genetic Programming Theory and Practice Vi. Springer US, 2009.

APA

Bill Worzel, R. Riolo, Riolo, R., Soule, T., & Worzel, B. (2009). Genetic Programming Theory and Practice VI. Springer US.

Chicago

Bill Worzel, Terence Soule, Rick Riolo., Rick Riolo, Terence Soule, and Bill Worzel. Genetic Programming Theory and Practice VI. : Springer US, 2009.