APA (7th ed.) Citation

Keighley, H. J. P., & McKim, F. R. (1965). The physical world: An O level course. Pergamon Press.

Chicago Style (17th ed.) Citation

Keighley, H. J. P., and F. R. McKim. The Physical World: An O Level Course. Oxford: Pergamon Press, 1965.

MLA (9th ed.) Citation

Keighley, H. J. P., and F. R. McKim. The Physical World: An O Level Course. Pergamon Press, 1965.