APA (7th ed.) Citation

Richards, G. W., & Scott, P. R. (1995). Energy levels in atoms and molecules. Oxford University Press.

Chicago Style (17th ed.) Citation

Richards, Graham W., and P. R. Scott. Energy Levels in Atoms and Molecules. Oxford: Oxford University Press, 1995.

MLA (8th ed.) Citation

Richards, Graham W., and P. R. Scott. Energy Levels in Atoms and Molecules. Oxford University Press, 1995.