APA (7th ed.) Citation

Kronig, R. (1935). The optical basis of chemical valence. The University Press.

Chicago Style (17th ed.) Citation

Kronig, R. The Optical Basis of Chemical Valence. Cambridge [England]: The University Press, 1935.

MLA (9th ed.) Citation

Kronig, R. The Optical Basis of Chemical Valence. The University Press, 1935.