APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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