The Nobel Prize in Chemistry 1975
John Cornforth, Vladimir Prelog
John Warcup Cornforth
The Nobel Prize in Chemistry 1975 was divided equally between John Warcup Cornforth "for his work on the stereochemistry of enzyme-catalyzed reactions" and Vladimir Prelog "for his research into the stereochemistry of organic molecules and reactions".
MLA style: "The Nobel Prize in Chemistry 1975". Nobelprize.org. 25 May 2013 http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1975/