Caldwell, Lynton Keith
Cambridge University Press , 1995
Buku Teks
Supriatnoko, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1999
UI - Tesis (Membership)
Wallace, Bruce, 1920-, author
Holt, Rinehart and Winston, 1963
Buku Teks
Cohen, Abner, author
Routledge & Kegan Paul, 1974
Buku Teks
Russell, Richard Joel, author
Macmillan, 1954, 1951
Buku Teks