APA (7th ed.) Citation

Gasser, R. P. H., & Richards, W. G. (1974). Entropy and energy levels. Clarendon Press.

Chicago Style (17th ed.) Citation

Gasser, Robert Paul Holland, and W. G. Richards. Entropy and Energy Levels. Oxford: Clarendon Press, 1974.

MLA (9th ed.) Citation

Gasser, Robert Paul Holland, and W. G. Richards. Entropy and Energy Levels. Clarendon Press, 1974.