Ratcliff, B., Eccles, H., Raffan, J., Nicholon, J., Johnson, D., Acaster, D., . . . Newman, J. (2004). AS level and A level chemistry. Cambridge University Press.

Ratcliff, Brian, Helen Eccles, John Raffan, John Nicholon, David Johnson, David Acaster, Philip Matthews, and John Newman. AS Level and A Level Chemistry. Cambridge: Cambridge University Press, 2004.

Ratcliff, Brian, et al. AS Level and A Level Chemistry. Cambridge University Press, 2004.