Wicksell, Knut
George Routledge and Sons , 1946
Buku Teks
Robbins, Lionel, editor
McMillan & Co., 1952
Buku Teks
Wecter, Dixon, 1906-1950
Macmillan, 1948
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Katz, Meighen
Routledge, 2020
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Fischer, Conan
Oxford University Press, 2017
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