Wicksell, Knut
Lectures on political economy / by Knut Wicksell; edited with and introduction by Lionel, Robbins
George Routledge and Sons , 1946
 Buku Teks SO
Italy at the millennium: Economy, politics, literature and journalism
Paolo Janni
The council for research in values and philoaophy, 2001
 Buku Teks SO
Schiller, Bradley R.
The economy/Bradlcy R. Schiller
Prentice-Hall, 1975
 Buku Teks SO
Brown, A.J.
Introduction to the world economy
George Allen and Unwin, 1959
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Robinson, Marshall A.
An Introduction to economy reasoning
Brookings Institution, 1955
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