Lucas, Robert W.
Amacom , 2005
Buku Teks
Brittan, Arthur
Routledge & Kegan Paul, 1973
Buku Teks
Sartre, Jean-Paul
Paris Gllimard [1951]
Buku Teks
Henderson, Harold Gould
E. Weyhe, 1939
Buku Referensi
Attenborough, David
BBC Worldwide Limited, 2005
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