1.
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New York : The Macmillan company ; London : Macmillan & Co., Ltd., 1903.
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2.
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[Lexington] University of Kentucky Press [1969]
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3.
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New York : Columbia University Press, 1913.
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4.
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New York : Columbia University Press, 1914.
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5.
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Washington : Carnegie Institution of Washington, 1919.
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6.
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New York : Garland Pub., 1988.
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7.
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New Haven, Yale University Press, 1926.
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