Callender, C. L., Hackett, P. A., & Rayner, D. M. (1988). First ionization potential of hafnium by double-resonance field-ionization spectroscopy. Journal of the Optical Society of America. B, Optical Physics, 5, 1341. https://doi.org/10.1364/JOSAB.5.001341
Chicago Style (17th ed.) CitationCallender, C. L., P. A. Hackett, and D. M. Rayner. "First Ionization Potential of Hafnium by Double-resonance Field-ionization Spectroscopy." Journal of the Optical Society of America. B, Optical Physics 5 (1988): 1341. https://doi.org/10.1364/JOSAB.5.001341.
MLA (9th ed.) CitationCallender, C. L., et al. "First Ionization Potential of Hafnium by Double-resonance Field-ionization Spectroscopy." Journal of the Optical Society of America. B, Optical Physics, vol. 5, 1988, p. 1341, https://doi.org/10.1364/JOSAB.5.001341.