Silverberg, Robert
Doubleday & Company, Inc., 1972
Buku Teks
Chaunu, Pierre
North-Holland Publishing Co., 1979
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Talon, Henri A.
London Longmans 1956
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Mottram, R.H.
London Longmans 1953
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Yakub, Abdillah Abi Abdillah bin, author
Commission bei F. A. Brockhaus, 1866
Buku Teks