Abbott, E. A.
London Seeley 1899
Buku Teks
Nash-Williams, A.H.
London MacMillan 1950
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Russell, C.H.St.L.
London MacMillan 1907
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Marouzeau, J.
Amsterdam Noord Hollandche 1948
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Beijing Beijing Yuyan Wenhua Daxue Chubanshe, 1999
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