Fenves, Steven J.
      
      
         Prentice-Hall, 1969
       Buku Teks SO
   
      edited by Michel Fremond and Franco Maceri
      
         Springer, 2012
       eBooks
   
Christian, John
      
      
         John Wiley & Sons, 1981
       Buku Teks SO
   
James, M.L.
      
      
         International Textbook, 1965
       Buku Teks SO
   
Bell, C. Gordon
      
      
         Digital Equipment, 1978
       Buku Teks SO