MLA

Shaker, Mark J Nelson, and Julian Togelius. Procedural Content Generation In Games. Springer International Publishing, 2016.

APA

Shaker, S., Nelson, M. J, & Togelius, J. (2016). Procedural Content Generation in Games. Springer International Publishing.

Chicago

Shaker, Mark J Nelson, and Julian Togelius. Procedural Content Generation In Games. : Springer International Publishing, 2016.