Ratcliff, B., Eccles, H., Raffan, J., Nicholon, J., Johnson, D., Acaster, D., . . . Newman, J. (2004). AS level and A Level: Chemistry. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRatcliff, Brian, Helen Eccles, John Raffan, John Nicholon, David Johnson, David Acaster, Philip Matthews, और John Newman. AS Level and A Level: Chemistry. Cambridge: Cambridge University Press, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRatcliff, Brian, et al. AS Level and A Level: Chemistry. Cambridge University Press, 2004.
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