Lowry, T. M., author
Macmillan, 1936
Buku Teks
Hart, Harold, 1922-, author
Houghton Mifflin, 1966
Buku Teks
Stapf, Helmut
"Leipzig: Edition, 1967",
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"Pacific Grove: Brooks/Cole Publishing Company, 1998",
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Clayden, Jonathan, author
Oxford University Press, 2001
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