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Buku Teks
Marx, Karl, 1818-1883
[publisher not identified], [date of publication no identified]
Buku Teks
Molyneux, John
Teplok Press, 2000
Buku Teks
Umaimah Wahid
1998
UI - Tesis (Membership)
Khadijah Hashim
Fajar Bakti , 1984
Buku Teks