Seligman, Edwin R.A.
The economic interpretation of history / Edwin R.A. Seligman
Columbia University Press, 1949
 Buku Teks
Instalment credit: British institute studies in international and comparative law No.4
Steven & Sons, 1970
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Chesterman, Andrew
On definiteness: a study with special reference to English and Finnish
Cambridge University Press, 1991
 Buku Teks
Batten,T.R.
Communities and their development : an introductory study with special reference to the tropics
Oxford University Press, 1960
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Lehfeldt, R.A.
Descriptive economics / by R.A. Lehfeldt
Oxford University , 1950
 Buku Teks