Atkins, P. W., and Julio De Paula. Atkins’ Physical Chemistry. 10th ed. Oxford: Oxford University Press, 2014. Print.
Ellis, Andrew M., Miklós Fehér, and Timothy G. Wright. Electronic and Photoelectron Spectroscopy: Fundamentals and Case Studies. Cambridge: Cambridge University Press, 2005. Print.
Hollas, J. Michael. High Resolution Spectroscopy. 2nd ed. Chichester: John Wiley & Sons, 1998. Print.
Hollas, J. Michael and MyiLibrary. Modern Spectroscopy. 4th ed. Chichester: John Wiley & Sons, 2004. Web. <https://ebookcentral.proquest.com/lib/nottingham/detail.action?docID=219771>.
Telle, Helmut H. et al. Laser Chemistry: Spectroscopy, Dynamics and Applications. Chichester: John Wiley & Sons, 2007. Web. <https://ebookcentral.proquest.com/lib/nottingham/detail.action?docID=292565>.