Cita APA (7a ed.)

Richards, W. (1994). Energy levels in atoms and molecules. Oxford Univ. Pr..

Cita Chicago Style (17a ed.)

Richards, W.G. Energy Levels in Atoms and Molecules. Oxford: Oxford Univ. Pr., 1994.

Cita MLA (9a ed.)

Richards, W.G. Energy Levels in Atoms and Molecules. Oxford Univ. Pr., 1994.