Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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