Atkins, P. W., Julio De Paula, and James Keeler. Atkins’ Physical Chemistry. Twelfth edition. Oxford: Oxford University Press, 2023.
Hollas, J. Michael and MyiLibrary. Modern Spectroscopy. 4th ed. Chichester: John Wiley & Sons, 2004. https://ebookcentral.proquest.com/lib/nottingham/detail.action?docID=219771.