APA (7th ed.) Citation

Richards, W. G., & Scott, P. R. (1994). Energy levels in atoms and molecules. Oxford Univ. Press.

Chicago Style (17th ed.) Citation

Richards, William G., and Peter R. Scott. Energy Levels in Atoms and Molecules. Oxford [u.a.]: Oxford Univ. Press, 1994.

MLA (9th ed.) Citation

Richards, William G., and Peter R. Scott. Energy Levels in Atoms and Molecules. Oxford Univ. Press, 1994.