MLA

Sutton, Richard S, and Andrew G Barto. Reinforcement Learning : an Introduction. Cambridge, MA: MIT Press, 1998.

APA

Sutton, R. S, & Barto, A. G. (1998). Reinforcement Learning : an introduction. Cambridge, MA: MIT Press.

Chicago

Sutton, Richard S., and Andrew G Barto. Reinforcement Learning: An Introduction. Cambridge, MA: MIT Press, 1998.