APA (7th ed.) Citation

Riley, P. (2011). Cambridge Checkpoint Science 2 (1st.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Riley, Peter. Cambridge Checkpoint Science 2. 1st. London: Cambridge University Press, 2011.

MLA (9th ed.) Citation

Riley, Peter. Cambridge Checkpoint Science 2. 1st. Cambridge University Press, 2011.