The Nobel Prize in Physics 1981
Nicolaas Bloembergen, Arthur L. Schawlow, Kai M. Siegbahn
Arthur Leonard Schawlow
Kai M. Siegbahn
The Nobel Prize in Physics 1981 was divided, one half jointly to Nicolaas Bloembergen and Arthur Leonard Schawlow "for their contribution to the development of laser spectroscopy" and the other half to Kai M. Siegbahn "for his contribution to the development of high-resolution electron spectroscopy".
MLA style: "The Nobel Prize in Physics 1981". Nobelprize.org. 21 May 2013 http://www.nobelprize.org/nobel_prizes/physics/laureates/1981/index.html