APA (7th ed.) Citation

Phillips, W. D., & Chilton, T. J. (1989). A-level biology. Oxford University Press.

Chicago Style (17th ed.) Citation

Phillips, W. D., and T. J. Chilton. A-level Biology. Oxford: Oxford University Press, 1989.

MLA (9th ed.) Citation

Phillips, W. D., and T. J. Chilton. A-level Biology. Oxford University Press, 1989.