Clarke, Stephen
      
      
         Black Swan, 2015
       Buku Teks SO
   
Alvin Adityo
      
      
         Universitas Indonesia, 2019
       UI - Tugas Akhir
   
Funk, Arthur Layton
      
      
         Norman University of Oklahoma Press, 1959
       Buku Teks SO
   
Schuman, Frederick L.
      
      
         Whittlesey House, 1931
       Buku Teks SO
   
Shklar, Judith N.
      
      
         Pustaka Utama Grafiti, 1996
       Buku Teks