Thomas, David A.
Allyn and Bacon, 1991
Buku Teks
Wise, David
Random House , 1964
Buku Teks
Herbert, David T.
John Wiley & Sons, 1982
Buku Teks
Thomas, David
[publisher not identified], 1962
Buku Teks
edited by Douglas Pratt, Jon Hoover, John Davies, John Chesworth
Brill, 2015
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