Cita APA (7a ed.)

Ratcliff, B. (2008). AS Level and A Level: Chemistry. Cambridge University Press.

Cita Chicago Style (17a ed.)

Ratcliff, Brian. AS Level and A Level: Chemistry. Cambridge University Press, 2008.

Cita MLA (8a ed.)

Ratcliff, Brian. AS Level and A Level: Chemistry. Cambridge University Press, 2008.