Freeman, Frank S.
Holt, Rinehart and Winston, 1960
Buku Teks
edited by James S. Holmes
The Hague, 1970
Buku Teks
Kiernan, John A.
Pergamon Press, 1981
Buku Teks
Lindholm, Charles
McGraw-Hill, 2001
Buku Teks
James C. Kaufman
Cambridge University Press, 2009
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