Robin, Ranger
Gage, 1979
Buku Teks
Edward, David V.
Holt, Rinehart and Winston, 1969
Buku Teks
Pudji Astuti
Program Pascasarjana Universitas Indonesia, 2011
UI - Tesis (Open)
Pierre, Andrew J.
Princeton University Press, 1982
Buku Teks
Calif ICS Press , 1984
Buku Teks