انرژی یونش عناصر (صفحه اطلاعات)

As quoted at http://www.webelements.com/ from these sources:

• J.E. Huheey, E.A. Keiter, and R.L. Keiter in Inorganic Chemistry: Principles of Structure and Reactivity, 4th edition, HarperCollins, New York, USA, 1993.
• A.M. James and M.P. Lord in Macmillan's Chemical and Physical Data, Macmillan, London, UK, 1992.

CRC

As quoted from various sources in an online version of:

• David R. Lide (ed), CRC Handbook of Chemistry and Physics, 84th Edition. CRC Press. Boca Raton, Florida, 2003; Section 10, Atomic, Molecular, and Optical Physics; Ionization Potentials of Atoms and Atomic Ions

Further sources may be:

• NIST Atomic Spectra Database, Version 3.0. http://physics.nist.gov/PhysRefData/ASD/index.html
• J.E. Sansonetti, W.C. Martin, and S.L. Young (2004), Handbook of Basic Atomic Spectroscopic Data (version 1.1). [Online] Available: http://physics.nist.gov/Handbook [2005, March 25]. National Institute of Standards and Technology, Gaithersburg, MD.